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root/OpenMD/trunk/forceFields/SMARTS_InteLigand.txt
Revision: 1081
Committed: Thu Oct 19 20:49:05 2006 UTC (18 years, 10 months ago) by gezelter
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updated OpenBabel to version 2.0.2

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# User Rev Content
1 gezelter 1081 #
2     # SMARTS Patterns for Functional Group Classification
3     #
4     # written by Christian Laggner
5     # Copyright 2005 Inte:Ligand Software-Entwicklungs und Consulting GmbH
6     #
7     # Released under the Lesser General Public License (LGPL license)
8     # see http://www.gnu.org/copyleft/lesser.html
9     # Version 221105
10     #####################################################################################################
11    
12     # General Stuff:
13     # These patters were written in an attempt to represent the classification of organic compounds
14     # from the viewpoint of an organic chemist.
15     # They are often very restrictive. This may be generally a good thing, but it also takes some time
16     # for filtering/indexing large compound sets.
17     # For filtering undesired groups (in druglike compounds) one will want to have more general patterns
18     # (e.g. you don't want *any* halide of *any* acid, *neither* aldehyde *nor* formyl esters and amides, ...).
19     #
20    
21     # Part I: Carbon
22     # ==============
23    
24    
25     # I.1: Carbon-Carbon Bonds
26     # ------------------------
27    
28     # I.1.1 Alkanes:
29    
30     Primary_carbon: [CX4H3][#6]
31    
32     Secondary_carbon: [CX4H2]([#6])[#6]
33    
34     Tertiary_carbon: [CX4H1]([#6])([#6])[#6]
35    
36     Quartary_carbon: [CX4]([#6])([#6])([#6])[#6]
37    
38    
39     # I.1.2 C-C double and Tripple Bonds
40    
41     Alkene: [CX3;$([H2]),$([H1][#6]),$(C([#6])[#6])]=[CX3;$([H2]),$([H1][#6]),$(C([#6])[#6])]
42     # sp2 C may be substituted only by C or H -
43     # does not hit ketenes and allenes, nor enamines, enols and the like
44    
45     Alkyne: [CX2]#[CX2]
46     # non-carbon substituents (e.g. alkynol ethers) are rather rare, thus no further discrimination
47    
48     Allene: [CX3]=[CX2]=[CX3]
49    
50    
51     # I.2: One Carbon-Hetero Bond
52     # ---------------------------
53    
54    
55     # I.2.1 Alkyl Halogenides
56    
57     Alkylchloride: [ClX1][CX4]
58     # will also hit chloromethylethers and the like, but no chloroalkenes, -alkynes or -aromats
59     # a more restrictive version can be obtained by modifying the Alcohol string.
60    
61     Alkylfluoride: [FX1][CX4]
62    
63     Alkylbromide: [BrX1][CX4]
64    
65     Alkyliodide: [IX1][CX4]
66    
67    
68     # I.2.2 Alcohols and Ethers
69    
70     Alcohol: [OX2H][CX4;!$(C([OX2H])[O,S,#7,#15])]
71     # nonspecific definition, no acetals, aminals, and the like
72    
73     Primary_alcohol: [OX2H][CX4H2;!$(C([OX2H])[O,S,#7,#15])]
74    
75     Secondary_alcohol: [OX2H][CX4H;!$(C([OX2H])[O,S,#7,#15])]
76    
77     Tertiary_alcohol: [OX2H][CX4D4;!$(C([OX2H])[O,S,#7,#15])]
78    
79     Dialkylether: [OX2]([CX4;!$(C([OX2])[O,S,#7,#15,F,Cl,Br,I])])[CX4;!$(C([OX2])[O,S,#7,#15])]
80     # no acetals and the like; no enolethers
81    
82     Dialkylthioether: [SX2]([CX4;!$(C([OX2])[O,S,#7,#15,F,Cl,Br,I])])[CX4;!$(C([OX2])[O,S,#7,#15])]
83     # no acetals and the like; no enolethers
84    
85     Alkylarylether: [OX2](c)[CX4;!$(C([OX2])[O,S,#7,#15,F,Cl,Br,I])]
86     # no acetals and the like; no enolethers
87    
88     Diarylether: [c][OX2][c]
89    
90     Alkylarylthioether: [SX2](c)[CX4;!$(C([OX2])[O,S,#7,#15,F,Cl,Br,I])]
91    
92     Diarylthioether: [c][SX2][c]
93    
94     Oxonium: [O+;!$([O]~[!#6]);!$([S]*~[#7,#8,#15,#16])]
95     # can't be aromatic, thus O and not #8
96    
97     # I.2.3 Amines
98    
99     Amine: [NX3+0,NX4+;!$([N]~[!#6]);!$([N]*~[#7,#8,#15,#16])]
100     # hits all amines (prim/sec/tert/quart), including ammonium salts, also enamines, but not amides, imides, aminals, ...
101    
102     # the following amines include also the protonated forms
103    
104     Primary_aliph_amine: [NX3H2+0,NX4H3+;!$([N][!C]);!$([N]*~[#7,#8,#15,#16])]
105    
106     Secondary_aliph_amine: [NX3H1+0,NX4H2+;!$([N][!C]);!$([N]*~[#7,#8,#15,#16])]
107    
108     Tertiary_aliph_amine: [NX3H0+0,NX4H1+;!$([N][!C]);!$([N]*~[#7,#8,#15,#16])]
109    
110     Quartary_aliph_ammonium: [NX4H0+;!$([N][!C]);!$([N]*~[#7,#8,#15,#16])]
111    
112     Primary_arom_amine: [NX3H2+0,NX4H3+]c
113    
114     Secondary_arom_amine: [NX3H1+0,NX4H2+;!$([N][!c]);!$([N]*~[#7,#8,#15,#16])]
115    
116     Tertiary_arom_amine: [NX3H0+0,NX4H1+;!$([N][!c]);!$([N]*~[#7,#8,#15,#16])]
117    
118     Quartary_arom_ammonium: [NX4H0+;!$([N][!c]);!$([N]*~[#7,#8,#15,#16])]
119    
120     Secondary_mixed_amine: [NX3H1+0,NX4H2+;$([N]([c])[C]);!$([N]*~[#7,#8,#15,#16])]
121    
122     Tertiary_mixed_amine: [NX3H0+0,NX4H1+;$([N]([c])([C])[#6]);!$([N]*~[#7,#8,#15,#16])]
123    
124     Quartary_mixed_ammonium: [NX4H0+;$([N]([c])([C])[#6][#6]);!$([N]*~[#7,#8,#15,#16])]
125    
126     Ammonium: [N+;!$([N]~[!#6]);!$(N=*);!$([N]*~[#7,#8,#15,#16])]
127     # only C and H substituents allowed. Quartary or protonated amines
128     # NX4+ or Nv4+ is not recognized by Daylight's depictmatch if less than four C are present
129    
130    
131     # I.2.4 Others
132    
133     Alkylthiol: [SX2H][CX4;!$(C([SX2H])~[O,S,#7,#15])]
134    
135     Dialkylthioether: [SX2]([CX4;!$(C([SX2])[O,S,#7,#15,F,Cl,Br,I])])[CX4;!$(C([SX2])[O,S,#7,#15])]
136    
137     Alkylarylthioether: [SX2](c)[CX4;!$(C([SX2])[O,S,#7,#15])]
138    
139     Disulfide: [SX2D2][SX2D2]
140    
141     1,2-Aminoalcohol: [OX2H][CX4;!$(C([OX2H])[O,S,#7,#15,F,Cl,Br,I])][CX4;!$(C([N])[O,S,#7,#15])][NX3;!$(NC=[O,S,N])]
142     # does not hit alpha-amino acids, enaminoalcohols, 1,2-aminoacetals, o-aminophenols, etc.
143    
144     1,2-Diol: [OX2H][CX4;!$(C([OX2H])[O,S,#7,#15])][CX4;!$(C([OX2H])[O,S,#7,#15])][OX2H]
145     # does not hit alpha-hydroxy acids, enolalcohols, 1,2-hydroxyacetals, 1,2-diphenols, etc.
146    
147     1,1-Diol: [OX2H][CX4;!$(C([OX2H])([OX2H])[O,S,#7,#15])][OX2H]
148    
149     Hydroperoxide: [OX2H][OX2]
150     #does not neccessarily have to be connected to a carbon atom, includes also hydrotrioxides
151    
152     Peroxo: [OX2D2][OX2D2]
153    
154     Organolithium_compounds: [LiX1][#6,#14]
155    
156     Organomagnesium_compounds: [MgX2][#6,#14]
157     # not restricted to Grignard compounds, also dialkyl Mg
158    
159     Organometallic_compounds: [!#1;!#5;!#6;!#7;!#8;!#9;!#14;!#15;!#16;!#17;!#33;!#34;!#35;!#52;!#53;!#85]~[#6;!-]
160     # very general, includes all metals covalently bound to carbon
161    
162    
163     # I.3: Two Carbon-Hetero Bonds (Carbonyl and Derivatives)
164     # ----------------------------
165    
166     # I.3.1 Double Bond to Hetero
167    
168     Aldehyde: [$([CX3H][#6]),$([CX3H2])]=[OX1]
169     # hits aldehydes including formaldehyde
170    
171     Ketone: [#6][CX3](=[OX1])[#6]
172     # does not include oxo-groups connected to a (hetero-) aromatic ring
173    
174     Thioaldehyde: [$([CX3H][#6]),$([CX3H2])]=[SX1]
175    
176     Thioketone: [#6][CX3](=[SX1])[#6]
177     # does not include thioxo-groups connected to a (hetero-) aromatic ring
178    
179     Imine: [NX2;$([N][#6]),$([NH]);!$([N][CX3]=[#7,#8,#15,#16])]=[CX3;$([CH2]),$([CH][#6]),$([C]([#6])[#6])]
180     # nitrogen is not part of an amidelike strukture, nor of an aromatic ring, but can be part of an aminal or similar
181    
182     Immonium: [NX3+;!$([N][!#6]);!$([N][CX3]=[#7,#8,#15,#16])]
183    
184     Oxime: [NX2](=[CX3;$([CH2]),$([CH][#6]),$([C]([#6])[#6])])[OX2H]
185    
186     Oximether: [NX2](=[CX3;$([CH2]),$([CH][#6]),$([C]([#6])[#6])])[OX2][#6;!$(C=[#7,#8])]
187     # ether, not ester or amide; does not hit isoxazole
188    
189    
190     # I.3.2. Two Single Bonds to Hetero
191    
192     Acetal: [OX2]([#6;!$(C=[O,S,N])])[CX4;!$(C(O)(O)[!#6])][OX2][#6;!$(C=[O,S,N])]
193     # does not hit hydroxy-methylesters, ketenacetals, hemiacetals, orthoesters, etc.
194    
195     Hemiacetal: [OX2H][CX4;!$(C(O)(O)[!#6])][OX2][#6;!$(C=[O,S,N])]
196    
197     Aminal: [NX3v3;!$(NC=[#7,#8,#15,#16])]([#6])[CX4;!$(C(N)(N)[!#6])][NX3v3;!$(NC=[#7,#8,#15,#16])][#6]
198     # Ns are not part of an amide or similar. v3 ist to exclude nitro and similar groups
199    
200     Hemiaminal: [NX3v3;!$(NC=[#7,#8,#15,#16])]([#6])[CX4;!$(C(N)(N)[!#6])][OX2H]
201    
202     Thioacetal: [SX2]([#6;!$(C=[O,S,N])])[CX4;!$(C(S)(S)[!#6])][SX2][#6;!$(C=[O,S,N])]
203    
204     Thiohemiacetal: [SX2]([#6;!$(C=[O,S,N])])[CX4;!$(C(S)(S)[!#6])][OX2H]
205    
206     Halogen_acetal_like: [NX3v3,SX2,OX2;!$(*C=[#7,#8,#15,#16])][CX4;!$(C([N,S,O])([N,S,O])[!#6])][FX1,ClX1,BrX1,IX1]
207     # hits chloromethylenethers and other reactive alkylating agents
208    
209     Acetal_like: [NX3v3,SX2,OX2;!$(*C=[#7,#8,#15,#16])][CX4;!$(C([N,S,O])([N,S,O])[!#6])][FX1,ClX1,BrX1,IX1,NX3v3,SX2,OX2;!$(*C=[#7,#8,#15,#16])]
210     # includes all of the above and other combinations (S-C-N, hydrates, ...), but still no aminomethylenesters and similar
211    
212     Halogenmethylen_ester_and_similar: [NX3v3,SX2,OX2;$(**=[#7,#8,#15,#16])][CX4;!$(C([N,S,O])([N,S,O])[!#6])][FX1,ClX1,BrX1,IX1]
213     # also reactive alkylating agents. Acid does not have to be carboxylic acid, also S- and P-based acids allowed
214    
215     NOS_methylen_ester_and_similar: [NX3v3,SX2,OX2;$(**=[#7,#8,#15,#16])][CX4;!$(C([N,S,O])([N,S,O])[!#6])][NX3v3,SX2,OX2;!$(*C=[#7,#8,#15,#16])]
216     # Same as above, but N,O or S instead of halogen. Ester/amide allowed only on one side
217    
218     Hetero_methylen_ester_and_similar: [NX3v3,SX2,OX2;$(**=[#7,#8,#15,#16])][CX4;!$(C([N,S,O])([N,S,O])[!#6])][FX1,ClX1,BrX1,IX1,NX3v3,SX2,OX2;!$(*C=[#7,#8,#15,#16])]
219     # Combination of the last two patterns
220    
221     Cyanhydrine: [NX1]#[CX2][CX4;$([CH2]),$([CH]([CX2])[#6]),$(C([CX2])([#6])[#6])][OX2H]
222    
223    
224     # I.3.3 Single Bond to Hetero, C=C Double Bond (Enols and Similar)
225    
226     Chloroalkene: [ClX1][CX3]=[CX3]
227    
228     Fluoroalkene: [FX1][CX3]=[CX3]
229    
230     Bromoalkene: [BrX1][CX3]=[CX3]
231    
232     Iodoalkene: [IX1][CX3]=[CX3]
233    
234     Enol: [OX2H][CX3;$([H1]),$(C[#6])]=[CX3]
235     # no phenols
236    
237     Endiol: [OX2H][CX3;$([H1]),$(C[#6])]=[CX3;$([H1]),$(C[#6])][OX2H]
238     # no 1,2-diphenols, ketenacetals, ...
239    
240     Enolether: [OX2]([#6;!$(C=[N,O,S])])[CX3;$([H0][#6]),$([H1])]=[CX3]
241     # finds also endiodiethers, but not enolesters, no aromats
242    
243     Enolester: [OX2]([CX3]=[OX1])[#6X3;$([#6][#6]),$([H1])]=[#6X3;!$(C[OX2H])]
244    
245    
246     Enamine: [NX3;$([NH2][CX3]),$([NH1]([CX3])[#6]),$([N]([CX3])([#6])[#6]);!$([N]*=[#7,#8,#15,#16])][CX3;$([CH]),$([C][#6])]=[CX3]
247     # does not hit amines attached to aromatic rings, nor may the nitrogen be aromatic
248    
249     Thioenol: [SX2H][CX3;$([H1]),$(C[#6])]=[CX3]
250    
251     Thioenolether: [SX2]([#6;!$(C=[N,O,S])])[CX3;$(C[#6]),$([CH])]=[CX3]
252    
253    
254     # I.4: Three Carbon-Hetero Bonds (Carboxyl and Derivatives)
255     # ------------------------------
256    
257     Acylchloride: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[ClX1]
258    
259     Acylfluoride: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[FX1]
260    
261     Acylbromide: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[BrX1]
262    
263     Acyliodide: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[IX1]
264    
265     Acylhalide: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[FX1,ClX1,BrX1,IX1]
266     # all of the above
267    
268    
269     # The following contains all simple carboxylic combinations of O, N, S, & Hal -
270     # - acids, esters, amides, ... as well as a few extra cases (anhydride, hydrazide...)
271     # Cyclic structures (including aromats) like lactones, lactames, ... got their own
272     # definitions. Structures where both heteroatoms are part of an aromatic ring
273     # (oxazoles, imidazoles, ...) were excluded.
274    
275     Carboxylic_acid: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[$([OX2H]),$([OX1-])]
276     # includes carboxylate anions
277    
278     Carboxylic_ester: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[OX2][#6;!$(C=[O,N,S])]
279     # does not hit anhydrides or lactones
280    
281     Lactone: [#6][#6X3R](=[OX1])[#8X2][#6;!$(C=[O,N,S])]
282     # may also be aromatic
283    
284     Carboxylic_anhydride: [CX3;$([H0][#6]),$([H1])](=[OX1])[#8X2][CX3;$([H0][#6]),$([H1])](=[OX1])
285     # anhydride formed by two carboxylic acids, no mixed anhydrides (e.g. between carboxylic acid and sulfuric acid); may be part of a ring, even aromatic
286    
287     Carboxylic_acid_derivative: [$([#6X3H0][#6]),$([#6X3H])](=[!#6])[!#6]
288     # includes most of the structures of I.4 and many more, also 1,3-heteroaromatics such as isoxazole
289    
290     Carbothioic_acid: [CX3;!R;$([C][#6]),$([CH]);$([C](=[OX1])[$([SX2H]),$([SX1-])]),$([C](=[SX1])[$([OX2H]),$([OX1-])])]
291     # hits both tautomeric forms, as well as anions
292    
293     Carbothioic_S_ester: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[SX2][#6;!$(C=[O,N,S])]
294    
295     Carbothioic_S_lactone: [#6][#6X3R](=[OX1])[#16X2][#6;!$(C=[O,N,S])]
296     # may also be aromatic
297    
298     Carbothioic_O_ester: [CX3;$([H0][#6]),$([H1])](=[SX1])[OX2][#6;!$(C=[O,N,S])]
299    
300     Carbothioic_O_lactone: [#6][#6X3R](=[SX1])[#8X2][#6;!$(C=[O,N,S])]
301    
302     Carbothioic_halide: [CX3;$([H0][#6]),$([H1])](=[SX1])[FX1,ClX1,BrX1,IX1]
303    
304     Carbodithioic_acid: [CX3;!R;$([C][#6]),$([CH]);$([C](=[SX1])[SX2H])]
305    
306     Carbodithioic_ester: [CX3;!R;$([C][#6]),$([CH]);$([C](=[SX1])[SX2][#6;!$(C=[O,N,S])])]
307    
308     Carbodithiolactone: [#6][#6X3R](=[SX1])[#16X2][#6;!$(C=[O,N,S])]
309    
310    
311     Amide: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
312     # does not hit lactames
313    
314     Primary_amide: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[NX3H2]
315    
316     Secondary_amide: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[#7X3H1][#6;!$(C=[O,N,S])]
317    
318     Tertiary_amide: [CX3;$([R0][#6]),$([H1R0])](=[OX1])[#7X3H0]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])]
319    
320     Lactam: [#6R][#6X3R](=[OX1])[#7X3;$([H1][#6;!$(C=[O,N,S])]),$([H0]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
321     # cyclic amides, may also be aromatic
322    
323     Alkyl_imide: [#6X3;$([H0][#6]),$([H1])](=[OX1])[#7X3H0]([#6])[#6X3;$([H0][#6]),$([H1])](=[OX1])
324     # may be part of a ring, even aromatic. only C allowed at central N. May also be triacyl amide
325    
326     N_hetero_imide: [#6X3;$([H0][#6]),$([H1])](=[OX1])[#7X3H0]([!#6])[#6X3;$([H0][#6]),$([H1])](=[OX1])
327     # everything else than H or C at central N
328    
329     Imide_acidic: [#6X3;$([H0][#6]),$([H1])](=[OX1])[#7X3H1][#6X3;$([H0][#6]),$([H1])](=[OX1])
330     # can be deprotonated
331    
332     Thioamide: [$([CX3;!R][#6]),$([CX3H;!R])](=[SX1])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
333     # does not hit thiolactames
334    
335     Thiolactam: [#6R][#6X3R](=[SX1])[#7X3;$([H1][#6;!$(C=[O,N,S])]),$([H0]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
336     # cyclic thioamides, may also be aromatic
337    
338    
339     Oximester: [#6X3;$([H0][#6]),$([H1])](=[OX1])[#8X2][#7X2]=,:[#6X3;$([H0]([#6])[#6]),$([H1][#6]),$([H2])]
340     # may also be part of a ring / aromatic
341    
342     Amidine: [NX3;!$(NC=[O,S])][CX3;$([CH]),$([C][#6])]=[NX2;!$(NC=[O,S])]
343     # only basic amidines, not as part of aromatic ring (e.g. imidazole)
344    
345     Hydroxamic_acid: [CX3;$([H0][#6]),$([H1])](=[OX1])[#7X3;$([H1]),$([H0][#6;!$(C=[O,N,S])])][$([OX2H]),$([OX1-])]
346    
347     Hydroxamic_acid_ester: [CX3;$([H0][#6]),$([H1])](=[OX1])[#7X3;$([H1]),$([H0][#6;!$(C=[O,N,S])])][OX2][#6;!$(C=[O,N,S])]
348     # does not hit anhydrides of carboxylic acids withs hydroxamic acids
349    
350    
351     Imidoacid: [CX3R0;$([H0][#6]),$([H1])](=[NX2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[$([OX2H]),$([OX1-])]
352     # not cyclic
353    
354     Imidoacid_cyclic: [#6R][#6X3R](=,:[#7X2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[$([OX2H]),$([OX1-])]
355     # the enamide-form of lactames. may be aromatic like 2-hydroxypyridine
356    
357     Imidoester: [CX3R0;$([H0][#6]),$([H1])](=[NX2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[OX2][#6;!$(C=[O,N,S])]
358     # esters of the above structures. no anhydrides.
359    
360     Imidolactone: [#6R][#6X3R](=,:[#7X2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[OX2][#6;!$(C=[O,N,S])]
361     # no oxazoles and similar
362    
363     Imidothioacid: [CX3R0;$([H0][#6]),$([H1])](=[NX2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[$([SX2H]),$([SX1-])]
364     # not cyclic
365    
366     Imidothioacid_cyclic: [#6R][#6X3R](=,:[#7X2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[$([SX2H]),$([SX1-])]
367     # the enamide-form of thiolactames. may be aromatic like 2-thiopyridine
368    
369     Imidothioester: [CX3R0;$([H0][#6]),$([H1])](=[NX2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[SX2][#6;!$(C=[O,N,S])]
370     # thioesters of the above structures. no anhydrides.
371    
372     Imidothiolactone: [#6R][#6X3R](=,:[#7X2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[SX2][#6;!$(C=[O,N,S])]
373     # no thioxazoles and similar
374    
375     Amidine: [#7X3v3;!$(N([#6X3]=[#7X2])C=[O,S])][CX3R0;$([H1]),$([H0][#6])]=[NX2v3;!$(N(=[#6X3][#7X3])C=[O,S])]
376     # only basic amidines, not substituted by carbonyl or thiocarbonyl, not as part of a ring
377    
378     Imidolactam: [#6][#6X3R;$([H0](=[NX2;!$(N(=[#6X3][#7X3])C=[O,S])])[#7X3;!$(N([#6X3]=[#7X2])C=[O,S])]),$([H0](-[NX3;!$(N([#6X3]=[#7X2])C=[O,S])])=,:[#7X2;!$(N(=[#6X3][#7X3])C=[O,S])])]
379     # one of the two C~N bonds is part of a ring (may be aromatic), but not both - thus no imidazole
380    
381     Imidoylhalide: [CX3R0;$([H0][#6]),$([H1])](=[NX2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[FX1,ClX1,BrX1,IX1]
382     # not cyclic
383    
384     Imidoylhalide_cyclic: [#6R][#6X3R](=,:[#7X2;$([H1]),$([H0][#6;!$(C=[O,N,S])])])[FX1,ClX1,BrX1,IX1]
385     # may also be aromatic
386    
387     # may be ring, aromatic, substituted with carbonyls, hetero, ...
388     # (everything else would get too complicated)
389    
390     Amidrazone: [$([$([#6X3][#6]),$([#6X3H])](=[#7X2v3])[#7X3v3][#7X3v3]),$([$([#6X3][#6]),$([#6X3H])]([#7X3v3])=[#7X2v3][#7X3v3])]
391     # hits both tautomers. as above, it may be ring, aromatic, substituted with carbonyls, hetero, ...
392    
393    
394     Alpha_aminoacid: [NX3,NX4+;!$([N]~[!#6]);!$([N]*~[#7,#8,#15,#16])][C][CX3](=[OX1])[OX2H,OX1-]
395     # N may be alkylated, but not part of an amide (as in peptides), ionic forms are included
396     # includes also non-natural aminoacids with double-bonded or two aliph./arom. substituents at alpha-C
397     # N may not be aromatic as in 1H-pyrrole-2-carboxylic acid
398    
399     Alpha_hydroxyacid: [OX2H][C][CX3](=[OX1])[OX2H,OX1-]
400    
401     Peptide_middle: [NX3;$([N][CX3](=[OX1])[C][NX3,NX4+])][C][CX3](=[OX1])[NX3;$([N][C][CX3](=[OX1])[NX3,OX2,OX1-])]
402     # finds peptidic structures which are neither C- nor N-terminal. Both neighbours must be amino-acids/peptides
403    
404     Peptide_C_term: [NX3;$([N][CX3](=[OX1])[C][NX3,NX4+])][C][CX3](=[OX1])[OX2H,OX1-]
405     # finds C-terminal amino acids
406    
407     Peptide_N_term: [NX3,NX4+;!$([N]~[!#6]);!$([N]*~[#7,#8,#15,#16])][C][CX3](=[OX1])[NX3;$([N][C][CX3](=[OX1])[NX3,OX2,OX1-])]
408     # finds N-terminal amino acids. As above, N may be substituted, but not part of an amide-bond.
409    
410    
411     Carboxylic_orthoester: [#6][OX2][CX4;$(C[#6]),$([CH])]([OX2][#6])[OX2][#6]
412     # hits also anhydride like struktures (e. g. HC(OMe)2-OC=O residues)
413    
414     Ketene: [CX3]=[CX2]=[OX1]
415    
416     Ketenacetal: [#7X2,#8X3,#16X2;$(*[#6,#14])][#6X3]([#7X2,#8X3,#16X2;$(*[#6,#14])])=[#6X3]
417     # includes aminals, silylacetals, ketenesters, etc. C=C DB is not aromatic, everything else may be
418    
419     Nitrile: [NX1]#[CX2]
420     # includes cyanhydrines
421    
422     Isonitrile: [CX1-]#[NX2+]
423    
424    
425     Vinylogous_carbonyl_or_carboxyl_derivative: [#6X3](=[OX1])[#6X3]=,:[#6X3][#7,#8,#16,F,Cl,Br,I]
426     # may be part of a ring, even aromatic
427    
428     Vinylogous_acid: [#6X3](=[OX1])[#6X3]=,:[#6X3][$([OX2H]),$([OX1-])]
429    
430     Vinylogous_ester: [#6X3](=[OX1])[#6X3]=,:[#6X3][#6;!$(C=[O,N,S])]
431    
432     Vinylogous_amide: [#6X3](=[OX1])[#6X3]=,:[#6X3][#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
433    
434     Vinylogous_halide: [#6X3](=[OX1])[#6X3]=,:[#6X3][FX1,ClX1,BrX1,IX1]
435    
436    
437    
438     # I.5: Four Carbon-Hetero Bonds (Carbonic Acid and Derivatives)
439     # -----------------------------
440    
441     Carbonic_acid_dieester: [#6;!$(C=[O,N,S])][#8X2][#6X3](=[OX1])[#8X2][#6;!$(C=[O,N,S])]
442     # may be part of a ring, even aromatic
443    
444     Carbonic_acid_esterhalide: [#6;!$(C=[O,N,S])][OX2;!R][CX3](=[OX1])[OX2][FX1,ClX1,BrX1,IX1]
445    
446     Carbonic_acid_monoester: [#6;!$(C=[O,N,S])][OX2;!R][CX3](=[OX1])[$([OX2H]),$([OX1-])]
447     # unstable
448    
449     Carbonic_acid_derivatives: [!#6][#6X3](=[!#6])[!#6]
450    
451    
452     Thiocarbonic_acid_dieester: [#6;!$(C=[O,N,S])][#8X2][#6X3](=[SX1])[#8X2][#6;!$(C=[O,N,S])]
453     # may be part of a ring, even aromatic
454    
455     Thiocarbonic_acid_esterhalide: [#6;!$(C=[O,N,S])][OX2;!R][CX3](=[SX1])[OX2][FX1,ClX1,BrX1,IX1]
456    
457     Thiocarbonic_acid_monoester: [#6;!$(C=[O,N,S])][OX2;!R][CX3](=[SX1])[$([OX2H]),$([OX1-])]
458    
459    
460     Urea:[#7X3;!$([#7][!#6])][#6X3](=[OX1])[#7X3;!$([#7][!#6])]
461     # no check whether part of imide, biuret, etc. Aromatic structures are only hit if
462     # both N share no double bonds, like in the dioxo-form of uracil
463    
464     Thiourea: [#7X3;!$([#7][!#6])][#6X3](=[SX1])[#7X3;!$([#7][!#6])]
465    
466     Isourea: [#7X2;!$([#7][!#6])]=,:[#6X3]([#8X2&!$([#8][!#6]),OX1-])[#7X3;!$([#7][!#6])]
467     # O may be substituted. no check whether further amide-like bonds are present. Aromatic
468     # structures are only hit if single bonded N shares no additional double bond, like in
469     # the 1-hydroxy-3-oxo form of uracil
470    
471     Isothiourea: [#7X2;!$([#7][!#6])]=,:[#6X3]([#16X2&!$([#16][!#6]),SX1-])[#7X3;!$([#7][!#6])]
472    
473     Guanidine: [N;v3X3,v4X4+][CX3](=[N;v3X2,v4X3+])[N;v3X3,v4X4+]
474     # also hits guanidinium salts. v3 and v4 to avoid nitroamidines
475    
476     Carbaminic_acid: [NX3]C(=[OX1])[O;X2H,X1-]
477     # quite unstable, unlikely to be found. Also hits salts
478    
479     Urethan: [#7X3][#6](=[OX1])[#8X2][#6]
480     # also hits when part of a ring, no check whether the last C is part of carbonyl
481    
482     Biuret: [#7X3][#6](=[OX1])[#7X3][#6](=[OX1])[#7X3]
483    
484     Semicarbazide: [#7X3][#7X3][#6X3]([#7X3;!$([#7][#7])])=[OX1]
485    
486     Carbazide: [#7X3][#7X3][#6X3]([#7X3][#7X3])=[OX1]
487    
488     Semicarbazone: [#7X2](=[#6])[#7X3][#6X3]([#7X3;!$([#7][#7])])=[OX1]
489    
490     Carbazone: [#7X2](=[#6])[#7X3][#6X3]([#7X3][#7X3])=[OX1]
491    
492     Thiosemicarbazide: [#7X3][#7X3][#6X3]([#7X3;!$([#7][#7])])=[SX1]
493    
494     Thiocarbazide: [#7X3][#7X3][#6X3]([#7X3][#7X3])=[SX1]
495    
496     Thiosemicarbazone: [#7X2](=[#6])[#7X3][#6X3]([#7X3;!$([#7][#7])])=[SX1]
497    
498     Thiocarbazone: [#7X2](=[#6])[#7X3][#6X3]([#7X3][#7X3])=[SX1]
499    
500    
501     Isocyanate: [NX2]=[CX2]=[OX1]
502    
503     Cyanate: [OX2][CX2]#[NX1]
504    
505     Isothiocyanate: [NX2]=[CX2]=[SX1]
506    
507     Thiocyanate: [SX2][CX2]#[NX1]
508    
509     Carbodiimide: [NX2]=[CX2]=[NX2]
510    
511     Orthocarbonic_derivatives: [CX4H0]([O,S,#7])([O,S,#7])([O,S,#7])[O,S,#7,F,Cl,Br,I]
512     # halogen allowed just once, to avoid mapping to -OCF3 and similar groups (much more
513     # stable as for example C(OCH3)4)
514    
515    
516     # I.6 Aromatics
517     # -------------
518    
519     # I know that this classification is not very logical, arylamines are found under I.2 ...
520    
521     Phenol: [OX2H][c]
522    
523     1,2-Diphenol: [OX2H][c][c][OX2H]
524    
525     Arylchloride: [Cl][c]
526    
527     Arylfluoride: [F][c]
528    
529     Arylbromide: [Br][c]
530    
531     Aryliodide: [I][c]
532    
533     Arylthiol: [SX2H][c]
534    
535     Iminoarene: [c]=[NX2;$([H1]),$([H0][#6;!$([C]=[N,S,O])])]
536     # N may be substituted with H or C, but not carbonyl or similar
537     # aromatic atom is always C, not S or P (these are not planar when substituted)
538    
539     Oxoarene: [c]=[OX1]
540    
541     Thioarene: [c]=[SX1]
542    
543     Hetero_N_basic_H: [nX3H1+0]
544     # as in pyrole. uncharged to exclude pyridinium ions
545    
546     Hetero_N_basic_no_H: [nX3H0+0]
547     # as in N-methylpyrole. uncharged to exclude pyridinium ions
548    
549     Hetero_N_nonbasic: [nX2,nX3+]
550     # as in pyridine, pyridinium
551    
552     Hetero_O: [o]
553    
554     Hetero_S: [sX2]
555     # X2 because Daylight's depictmatch falsely describes C1=CS(=O)C=C1 as aromatic
556     # (is not planar because of lonepair at S)
557    
558     Heteroaromatic: [a;!c]
559    
560    
561     # Part II: N, S, P, Si, B
562     # =======================
563    
564    
565     # II.1 Nitrogen
566     # -------------
567    
568     Nitrite: [NX2](=[OX1])[O;$([X2]),$([X1-])]
569     # hits nitrous acid, its anion, esters, and other O-substituted derivatives
570    
571     Thionitrite: [SX2][NX2]=[OX1]
572    
573     Nitrate: [$([NX3](=[OX1])(=[OX1])[O;$([X2]),$([X1-])]),$([NX3+]([OX1-])(=[OX1])[O;$([X2]),$([X1-])])]
574     # hits nitric acid, its anion, esters, and other O-substituted derivatives
575    
576     Nitro: [$([NX3](=O)=O),$([NX3+](=O)[O-])][!#8]
577     # hits nitro groups attached to C,N, ... but not nitrates
578    
579     Nitroso: [NX2](=[OX1])[!#7;!#8]
580     # no nitrites, no nitrosamines
581    
582     Azide: [NX1]~[NX2]~[NX2,NX1]
583     # hits both mesomeric forms, also anion
584    
585     Acylazide: [CX3](=[OX1])[NX2]~[NX2]~[NX1]
586    
587     Diazo: [$([#6]=[NX2+]=[NX1-]),$([#6-]-[NX2+]#[NX1])]
588    
589     Diazonium: [#6][NX2+]#[NX1]
590    
591     Nitrosamine: [#7;!$(N*=O)][NX2]=[OX1]
592    
593     Nitrosamide: [NX2](=[OX1])N-*=O
594     # includes nitrososulfonamides
595    
596     N-Oxide: [$([#7+][OX1-]),$([#7v5]=[OX1]);!$([#7](~[O])~[O]);!$([#7]=[#7])]
597     # Hits both forms. Won't hit azoxy, nitro, nitroso, or nitrate.
598    
599    
600     Hydrazine: [NX3;$([H2]),$([H1][#6]),$([H0]([#6])[#6]);!$(NC=[O,N,S])][NX3;$([H2]),$([H1][#6]),$([H0]([#6])[#6]);!$(NC=[O,N,S])]
601     # no hydrazides
602    
603     Hydrazone: [NX3;$([H2]),$([H1][#6]),$([H0]([#6])[#6]);!$(NC=[O,N,S])][NX2]=[#6]
604    
605     Hydroxylamine: [NX3;$([H2]),$([H1][#6]),$([H0]([#6])[#6]);!$(NC=[O,N,S])][OX2;$([H1]),$(O[#6;!$(C=[N,O,S])])]
606     # no discrimination between O-, N-, and O,N-substitution
607    
608    
609     # II.2 Sulfur
610     # -----------
611    
612     Sulfon: [$([SX4](=[OX1])(=[OX1])([#6])[#6]),$([SX4+2]([OX1-])([OX1-])([#6])[#6])]
613     # can't be aromatic, thus S and not #16
614    
615     Sulfoxide: [$([SX3](=[OX1])([#6])[#6]),$([SX3+]([OX1-])([#6])[#6])]
616    
617     Sulfonium: [S+;!$([S]~[!#6]);!$([S]*~[#7,#8,#15,#16])]
618     # can't be aromatic, thus S and not #16
619    
620     Sulfuric_acid: [SX4](=[OX1])(=[OX1])([$([OX2H]),$([OX1-])])[$([OX2H]),$([OX1-])]
621     # includes anions
622    
623     Sulfuric_monoester: [SX4](=[OX1])(=[OX1])([$([OX2H]),$([OX1-])])[OX2][#6;!$(C=[O,N,S])]
624    
625     Sulfuric_diester: [SX4](=[OX1])(=[OX1])([OX2][#6;!$(C=[O,N,S])])[OX2][#6;!$(C=[O,N,S])]
626    
627     Sulfuric_monoamide: [SX4](=[OX1])(=[OX1])([#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])])[$([OX2H]),$([OX1-])]
628    
629     Sulfuric_diamide: [SX4](=[OX1])(=[OX1])([#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
630    
631     Sulfuric_esteramide: [SX4](=[OX1])(=[OX1])([#7X3][#6;!$(C=[O,N,S])])[OX2][#6;!$(C=[O,N,S])]
632    
633     Sulfuric_derivative: [SX4D4](=[!#6])(=[!#6])([!#6])[!#6]
634     # everything else (would not be a "true" derivative of sulfuric acid, if one of the substituents were less electronegative
635     # than sulfur, but this should be very very rare, anyway)
636    
637    
638    
639     #### sulfurous acid and derivatives missing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
640    
641    
642    
643    
644     Sulfonic_acid: [SX4;$([H1]),$([H0][#6])](=[OX1])(=[OX1])[$([OX2H]),$([OX1-])]
645    
646     Sulfonamide: [SX4;$([H1]),$([H0][#6])](=[OX1])(=[OX1])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
647    
648     Sulfonic_ester: [SX4;$([H1]),$([H0][#6])](=[OX1])(=[OX1])[OX2][#6;!$(C=[O,N,S])]
649    
650     Sulfonic_halide: [SX4;$([H1]),$([H0][#6])](=[OX1])(=[OX1])[FX1,ClX1,BrX1,IX1]
651    
652     Sulfonic_derivative: [SX4;$([H1]),$([H0][#6])](=[!#6])(=[!#6])[!#6]
653     # includes all of the above and many more
654     # for comparison: this is what "all sulfonic derivatives but not the ones above" would look like:
655     # [$([SX4;$([H1]),$([H0][#6])](=[!#6])(=[!#6;!O])[!#6]),$([SX4;$([H1]),$([H0][#6])](=[OX1])(=[OX1])[!$([FX1,ClX1,BrX1,IX1]);!$([#6]);!$([OX2H]);!$([OX1-]);!$([OX2][#6;!$(C=[O,N,S])]);!$([#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])])])]
656    
657    
658     Sulfinic_acid: [SX3;$([H1]),$([H0][#6])](=[OX1])[$([OX2H]),$([OX1-])]
659    
660     Sulfinic_amide: [SX3;$([H1]),$([H0][#6])](=[OX1])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
661    
662     Sulfinic_ester: [SX3;$([H1]),$([H0][#6])](=[OX1])[OX2][#6;!$(C=[O,N,S])]
663    
664     Sulfinic_halide: [SX3;$([H1]),$([H0][#6])](=[OX1])[FX1,ClX1,BrX1,IX1]
665    
666     Sulfinic_derivative: [SX3;$([H1]),$([H0][#6])](=[!#6])[!#6]
667    
668     Sulfenic_acid: [SX2;$([H1]),$([H0][#6])][$([OX2H]),$([OX1-])]
669    
670     Sulfenic_amide: [SX2;$([H1]),$([H0][#6])][#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
671    
672     Sulfenic_ester: [SX2;$([H1]),$([H0][#6])][OX2][#6;!$(C=[O,N,S])]
673    
674     Sulfenic_halide: [SX2;$([H1]),$([H0][#6])][FX1,ClX1,BrX1,IX1]
675    
676     Sulfenic_derivative: [SX2;$([H1]),$([H0][#6])][!#6]
677    
678    
679     # II.3 Phosphorous
680     # ----------------
681    
682     Phosphine: [PX3;$([H3]),$([H2][#6]),$([H1]([#6])[#6]),$([H0]([#6])([#6])[#6])]
683     # similar to amine, but less restrictive: includes also amide- and aminal-analogues
684    
685     Phosphine_oxide: [PX4;$([H3]=[OX1]),$([H2](=[OX1])[#6]),$([H1](=[OX1])([#6])[#6]),$([H0](=[OX1])([#6])([#6])[#6])]
686    
687     Phosphonium: [P+;!$([P]~[!#6]);!$([P]*~[#7,#8,#15,#16])]
688     # similar to Ammonium
689    
690     Phosphorylen: [PX4;$([H3]=[CX3]),$([H2](=[CX3])[#6]),$([H1](=[CX3])([#6])[#6]),$([H0](=[CX3])([#6])([#6])[#6])]
691    
692    
693     # conventions for the following acids and derivatives:
694     # acids find protonated and deprotonated acids
695     # esters do not find mixed anhydrides ( ...P-O-C(=O))
696     # derivatives: subtituents which go in place of the OH and =O are not H or C (may also be O,
697     # thus including acids and esters)
698    
699     Phosphonic_acid: [PX4;$([H1]),$([H0][#6])](=[OX1])([$([OX2H]),$([OX1-])])[$([OX2H]),$([OX1-])]
700     # includes anions
701    
702     Phosphonic_monoester: [PX4;$([H1]),$([H0][#6])](=[OX1])([$([OX2H]),$([OX1-])])[OX2][#6;!$(C=[O,N,S])]
703    
704     Phosphonic_diester: [PX4;$([H1]),$([H0][#6])](=[OX1])([OX2][#6;!$(C=[O,N,S])])[OX2][#6;!$(C=[O,N,S])]
705    
706     Phosphonic_monoamide: [PX4;$([H1]),$([H0][#6])](=[OX1])([$([OX2H]),$([OX1-])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
707    
708     Phosphonic_diamide: [PX4;$([H1]),$([H0][#6])](=[OX1])([#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
709    
710     Phosphonic_esteramide: [PX4;$([H1]),$([H0][#6])](=[OX1])([OX2][#6;!$(C=[O,N,S])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
711    
712     Phosphonic_acid_derivative: [PX4;$([H1]),$([H0][#6])](=[!#6])([!#6])[!#6]
713     # all of the above and much more
714    
715    
716     Phosphoric_acid: [PX4D4](=[OX1])([$([OX2H]),$([OX1-])])([$([OX2H]),$([OX1-])])[$([OX2H]),$([OX1-])]
717     # includes anions
718    
719     Phosphoric_monoester: [PX4D4](=[OX1])([$([OX2H]),$([OX1-])])([$([OX2H]),$([OX1-])])[OX2][#6;!$(C=[O,N,S])]
720    
721     Phosphoric_diester: [PX4D4](=[OX1])([$([OX2H]),$([OX1-])])([OX2][#6;!$(C=[O,N,S])])[OX2][#6;!$(C=[O,N,S])]
722    
723     Phosphoric_triester: [PX4D4](=[OX1])([OX2][#6;!$(C=[O,N,S])])([OX2][#6;!$(C=[O,N,S])])[OX2][#6;!$(C=[O,N,S])]
724    
725     Phosphoric_monoamide: [PX4D4](=[OX1])([$([OX2H]),$([OX1-])])([$([OX2H]),$([OX1-])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
726    
727     Phosphoric_diamide: [PX4D4](=[OX1])([$([OX2H]),$([OX1-])])([#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
728    
729     Phosphoric_triamide: [PX4D4](=[OX1])([#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])])([#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
730    
731     Phosphoric_monoestermonoamide: [PX4D4](=[OX1])([$([OX2H]),$([OX1-])])([OX2][#6;!$(C=[O,N,S])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
732    
733     Phosphoric_diestermonoamide: [PX4D4](=[OX1])([OX2][#6;!$(C=[O,N,S])])([OX2][#6;!$(C=[O,N,S])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
734    
735     Phosphoric_monoesterdiamide: [PX4D4](=[OX1])([OX2][#6;!$(C=[O,N,S])])([#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
736    
737     Phosphoric_acid_derivative: [PX4D4](=[!#6])([!#6])([!#6])[!#6]
738    
739    
740     Phosphinic_acid: [PX4;$([H2]),$([H1][#6]),$([H0]([#6])[#6])](=[OX1])[$([OX2H]),$([OX1-])]
741    
742     Phosphinic_ester: [PX4;$([H2]),$([H1][#6]),$([H0]([#6])[#6])](=[OX1])[OX2][#6;!$(C=[O,N,S])]
743    
744     Phosphinic_amide: [PX4;$([H2]),$([H1][#6]),$([H0]([#6])[#6])](=[OX1])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
745    
746     Phosphinic_acid_derivative: [PX4;$([H2]),$([H1][#6]),$([H0]([#6])[#6])](=[!#6])[!#6]
747    
748    
749     Phosphonous_acid: [PX3;$([H1]),$([H0][#6])]([$([OX2H]),$([OX1-])])[$([OX2H]),$([OX1-])]
750    
751     Phosphonous_monoester: [PX3;$([H1]),$([H0][#6])]([$([OX2H]),$([OX1-])])[OX2][#6;!$(C=[O,N,S])]
752    
753     Phosphonous_diester: [PX3;$([H1]),$([H0][#6])]([OX2][#6;!$(C=[O,N,S])])[OX2][#6;!$(C=[O,N,S])]
754    
755     Phosphonous_monoamide: [PX3;$([H1]),$([H0][#6])]([$([OX2H]),$([OX1-])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
756    
757     Phosphonous_diamide: [PX3;$([H1]),$([H0][#6])]([#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
758    
759     Phosphonous_esteramide: [PX3;$([H1]),$([H0][#6])]([OX2][#6;!$(C=[O,N,S])])[#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
760    
761     Phosphonous_derivatives: [PX3;$([D2]),$([D3][#6])]([!#6])[!#6]
762    
763    
764     Phosphinous_acid: [PX3;$([H2]),$([H1][#6]),$([H0]([#6])[#6])][$([OX2H]),$([OX1-])]
765    
766     Phosphinous_ester: [PX3;$([H2]),$([H1][#6]),$([H0]([#6])[#6])][OX2][#6;!$(C=[O,N,S])]
767    
768     Phosphinous_amide: [PX3;$([H2]),$([H1][#6]),$([H0]([#6])[#6])][#7X3;$([H2]),$([H1][#6;!$(C=[O,N,S])]),$([#7]([#6;!$(C=[O,N,S])])[#6;!$(C=[O,N,S])])]
769    
770     Phosphinous_derivatives: [PX3;$([H2]),$([H1][#6]),$([H0]([#6])[#6])][!#6]
771    
772    
773     # II.4 Silicon
774     # ------------
775    
776     Quart_silane: [SiX4]([#6])([#6])([#6])[#6]
777     # four C-substituents. non-reactive, non-toxic, in experimental phase for drug development
778    
779     Non-quart_silane: [SiX4;$([H1]([#6])([#6])[#6]),$([H2]([#6])[#6]),$([H3][#6]),$([H4])]
780     # has 1-4 hydride(s), reactive. Daylight's depictmatch does not add hydrogens automatically to
781     # the free positions at Si, thus Hs had to be added implicitly
782    
783     Silylmonohalide: [SiX4]([FX1,ClX1,BrX1,IX1])([#6])([#6])[#6]
784     # reagents for inserting protection groups
785    
786     Het_trialkylsilane: [SiX4]([!#6])([#6])([#6])[#6]
787     # mostly acid-labile protection groups such as trimethylsilyl-ethers
788    
789     Dihet_dialkylsilane: [SiX4]([!#6])([!#6])([#6])[#6]
790    
791     Trihet_alkylsilane: [SiX4]([!#6])([!#6])([!#6])[#6]
792    
793     Silicic_acid_derivative: [SiX4]([!#6])([!#6])([!#6])[!#6]
794     # four substituent which are neither C nor H
795    
796    
797     # II.5 Boron
798     # ----------
799    
800     Trialkylborane: [BX3]([#6])([#6])[#6]
801     # also carbonyls allowed
802    
803     Boric_acid_derivatives: [BX3]([!#6])([!#6])[!#6]
804     # includes acids, esters, amides, ... H-substituent at B is very rare.
805    
806     Boronic_acid_derivative: [BX3]([!#6])([!#6])[!#6]
807     # # includes acids, esters, amides, ...
808    
809     Borohydride: [BH1,BH2,BH3,BH4]
810     # at least one H attached to B
811    
812     Quartary_boron: [BX4]
813     # mostly borates (negative charge), in complex with Lewis-base
814    
815    
816    
817     # Part III: Some Special Patterns
818     # ===============================
819    
820    
821     # III.1 Chains
822     # ------------
823    
824     # some simple chains
825    
826    
827    
828     # III.2 Rings
829     # -----------
830    
831     Aromatic: a
832    
833     Heterocyclic: [!#6;!R0]
834     # may be aromatic or not
835    
836     Epoxide: [OX2r3]1[#6r3][#6r3]1
837     # toxic/reactive. may be annelated to aromat, but must not be aromatic itself (oxirane-2,3-dione)
838    
839     NH_aziridine: [NX3H1r3]1[#6r3][#6r3]1
840     # toxic/reactive according to Maybridge's garbage filter
841    
842     Spiro: [D4R;$(*(@*)(@*)(@*)@*)]
843     # at least two different rings can be found which are sharing just one atom.
844     # these two rings can be connected by a third ring, so it matches also some
845     # bridged systems, like morphine
846    
847     Annelated_rings: [R;$(*(@*)(@*)@*);!$([R2;$(*(@*)(@*)(@*)@*)])]@[R;$(*(@*)(@*)@*);!$([R2;$(*(@*)(@*)(@*)@*)])]
848     # two different rings sharing exactly two atoms
849    
850     Bridged_rings: [R;$(*(@*)(@*)@*);!$([D4R;$(*(@*)(@*)(@*)@*)]);!$([R;$(*(@*)(@*)@*);!$([R2;$(*(@*)(@*)(@*)@*)])]@[R;$(*(@*)(@*)@*);!$([R2;$(*(@*)(@*)(@*)@*)])])]
851     # part of two or more rings, not spiro, not annelated -> finds bridgehead atoms,
852     # but only if they are not annelated at the same time - otherwise impossible (?)
853     # to distinguish from non-bridgehead annelated atoms
854    
855     # some basic ring-patterns (just size, no other information):
856    
857    
858    
859    
860    
861     # III.3 Sugars and Nucleosides/Nucleotides, Steroids
862     # --------------------------------------------------
863    
864     # because of the large variety of sugar derivatives, different patterns can be applied.
865     # The choice of patterns and their combinations will depend on the contents of the database
866     # e.g. natural products, nucleoside analoges with modified sugars, ... as well as on the
867     # desired restriction
868    
869    
870     Sugar_pattern_1: [OX2;$([r5]1@C@C@C(O)@C1),$([r6]1@C@C@C(O)@C(O)@C1)]
871     # 5 or 6-membered ring containing one O and at least one (r5) or two (r6) oxygen-substituents.
872    
873     Sugar_pattern_2: [OX2;$([r5]1@C(!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C1),$([r6]1@C(!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C@C1)]
874     # 5 or 6-membered ring containing one O and an acetal-like bond at postion 2.
875    
876     Sugar_pattern_combi: [OX2;$([r5]1@C(!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C(O)@C1),$([r6]1@C(!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C(O)@C(O)@C1)]
877     # combination of the two above
878    
879     Sugar_pattern_2_reducing: [OX2;$([r5]1@C(!@[OX2H1])@C@C@C1),$([r6]1@C(!@[OX2H1])@C@C@C@C1)]
880     # 5 or 6-membered cyclic hemi-acetal
881    
882     Sugar_pattern_2_alpha: [OX2;$([r5]1@[C@@](!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C1),$([r6]1@[C@@](!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C@C1)]
883     # 5 or 6-membered cyclic hemi-acetal
884    
885     Sugar_pattern_2_beta: [OX2;$([r5]1@[C@](!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C1),$([r6]1@[C@](!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C@C1)]
886     # 5 or 6-membered cyclic hemi-acetal
887    
888     Poly_sugar_1: ([OX2;$([r5]1@C@C@C(O)@C1),$([r6]1@C@C@C(O)@C(O)@C1)].[OX2;$([r5]1@C@C@C(O)@C1),$([r6]1@C@C@C(O)@C(O)@C1)])
889     # pattern1 occours more than once (in same molecule, but moieties don't have to be adjacent!)
890    
891     Poly_sugar_2: ([OX2;$([r5]1@C(!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C1),$([r6]1@C(!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C@C1)].[OX2;$([r5]1@C(!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C1),$([r6]1@C(!@[OX2,NX3,SX2,FX1,ClX1,BrX1,IX1])@C@C@C@C1)])
892     # pattern2 occours more than once (in same molecule, but moieties don't have to be adjacent!)
893    
894    
895     # III.4 Everything else...
896     # ------------------------
897    
898     Conjugated_double_bond: *=*[*]=,#,:[*]
899    
900     Conjugated_tripple_bond: *#*[*]=,#,:[*]
901    
902     Cis_double_bond: */[D2]=[D2]\*
903     # only one single-bonded substituent on each DB-atom. no aromats.
904     # only found when character of DB is explicitely stated.
905    
906     Trans_double_bond: */[D2]=[D2]/*
907     # analog
908    
909     Mixed_anhydrides: [$(*=O),$([#16,#14,#5]),$([#7]([#6]=[OX1]))][#8X2][$(*=O),$([#16,#14,#5]),$([#7]([#6]=[OX1]))]
910     # should hits all combinations of two acids
911    
912     Halogen_on_hetero: [FX1,ClX1,BrX1,IX1][!#6]
913    
914     Halogen_multi_subst: [F,Cl,Br,I;!$([X1]);!$([X0-])]
915     # Halogen which is not mono-substituted nor an anion, e.g. chlorate.
916     # Most of these cases should be also filtered by Halogen_on_hetero.
917    
918     Trifluoromethyl: [FX1][CX4;!$([H0][Cl,Br,I]);!$([F][C]([F])([F])[F])]([FX1])([FX1])
919     # C with three F attached, connected to anything which is not another halogen
920    
921     C_ONS_bond: [#6]~[#7,#8,#16]
922     # probably all drug-like molecules have at least one O, N, or S connected to a C -> nice filter
923    
924     # Mixture: (*).(*)
925     # two or more seperate parts, may also be salt
926     # component-level grouping is not yet supported in Open Babel Version 2.0
927    
928    
929     Charged: [!+0]
930    
931     Anion: [-1,-2,-3,-4,-5,-6,-7]
932    
933     Kation: [+1,+2,+3,+4,+5,+6,+7]
934    
935     Salt: ([-1,-2,-3,-4,-5,-6,-7]).([+1,+2,+3,+4,+5,+6,+7])
936     # two or more seperate components with opposite charges
937    
938     Zwitterion: ([-1,-2,-3,-4,-5,-6,-7].[+1,+2,+3,+4,+5,+6,+7])
939     # both negative and positive charges somewhere within the same molecule.
940    
941     1,3-Tautomerizable: [$([#7X2,OX1,SX1]=*[!H0;!$([a;!n])]),$([#7X3,OX2,SX2;!H0]*=*),$([#7X3,OX2,SX2;!H0]*:n)]
942     # 1,3 migration of H allowed. Includes keto/enol and amide/enamide.
943     # Aromatic rings must stay aromatic - no keto form of phenol
944    
945     1,5-Tautomerizable: [$([#7X2,OX1,SX1]=,:**=,:*[!H0;!$([a;!n])]),$([#7X3,OX2,SX2;!H0]*=**=*),$([#7X3,OX2,SX2;!H0]*=,:**:n)]
946    
947     Rotatable_bond: [!$(*#*)&!D1]-!@[!$(*#*)&!D1]
948     # taken from http://www.daylight.com/support/contrib/smarts/content.html
949    
950     Michael_acceptor: [CX3]=[CX3][$([CX3]=[O,N,S]),$(C#[N]),$([S,P]=[OX1]),$([NX3]=O),$([NX3+](=O)[O-])]
951     # the classical case: C=C near carbonyl, nitrile, nitro, or similar
952     # Oxo-heteroaromats and similar are not included.
953    
954     Dicarbodiazene: [CX3](=[OX1])[NX2]=[NX2][CX3](=[OX1])
955     # Michael-like acceptor, see Mitsunobu reaction
956    
957     # H-Bond_donor:
958    
959     # H-Bond_acceptor:
960    
961     # Pos_ionizable:
962    
963     # Neg_ionizable:
964    
965     # Unlikely_ions:
966     # O+,N-,C+,C-, ...
967    
968     CH-acidic: [$([CX4;!$([H0]);!$(C[!#6;!$([P,S]=O);!$(N(~O)~O)])][$([CX3]=[O,N,S]),$(C#[N]),$([S,P]=[OX1]),$([NX3]=O),$([NX3+](=O)[O-]);!$(*[S,O,N;H1,H2]);!$([*+0][S,O;X1-])]),$([CX4;!$([H0])]1[CX3]=[CX3][CX3]=[CX3]1)]
969     # C-H alpha to carbony, nitro or similar, C is not double-bonded, only C, H, S,P=O and nitro substituents allowed.
970     # pentadiene is included. acids, their salts, prim./sec. amides, and imides are excluded.
971     # hits also CH-acidic_strong
972    
973     CH-acidic_strong: [CX4;!$([H0]);!$(C[!#6;!$([P,S]=O);!$(N(~O)~O)])]([$([CX3]=[O,N,S]),$(C#[N]),$([S,P]=[OX1]),$([NX3]=O),$([NX3+](=O)[O-]);!$(*[S,O,N;H1,H2]);!$([*+0][S,O;X1-])])[$([CX3]=[O,N,S]),$(C#[N]),$([S,P]=[OX1]),$([NX3]=O),$([NX3+](=O)[O-]);!$(*[S,O,N;H1,H2]);!$([*+0][S,O;X1-])]
974     # same as above (without pentadiene), but carbonyl or similar on two or three sides
975    
976     Chiral_center_specified: [$([*@](~*)(~*)(*)*),$([*@H](*)(*)*),$([*@](~*)(*)*),$([*@H](~*)~*)]
977     # Hits atoms with tetrahedral chirality, if chiral center is specified in the SMILES string
978     # depictmach does not find oxonium, sulfonium, or sulfoxides!
979    
980     # Chiral_center_unspecified: [$([*@?](~*)(~*)(*)*),$([*@?H](*)(*)*),$([*@?](~*)(*)*),$([*@?H](~*)~*)]
981     # Hits atoms with tetrahedral chirality, if chiral center is not specified in the SMILES string
982     # "@?" (unspecified chirality) is not yet supported in Open Babel Version 2.0
983