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14 <a name="package-MolecularDescriptors::RotatableBondsDescriptors-"></a> 1 <span class="k">package </span><span class="i">MolecularDescriptors::RotatableBondsDescriptors</span><span class="sc">;</span>
15 2 <span class="c">#</span>
16 3 <span class="c"># $RCSfile: RotatableBondsDescriptors.pm,v $</span>
17 4 <span class="c"># $Date: 2015/02/28 20:49:20 $</span>
18 5 <span class="c"># $Revision: 1.18 $</span>
19 6 <span class="c">#</span>
20 7 <span class="c"># Author: Manish Sud &lt;msud@san.rr.com&gt;</span>
21 8 <span class="c">#</span>
22 9 <span class="c"># Copyright (C) 2015 Manish Sud. All rights reserved.</span>
23 10 <span class="c">#</span>
24 11 <span class="c"># This file is part of MayaChemTools.</span>
25 12 <span class="c">#</span>
26 13 <span class="c"># MayaChemTools is free software; you can redistribute it and/or modify it under</span>
27 14 <span class="c"># the terms of the GNU Lesser General Public License as published by the Free</span>
28 15 <span class="c"># Software Foundation; either version 3 of the License, or (at your option) any</span>
29 16 <span class="c"># later version.</span>
30 17 <span class="c">#</span>
31 18 <span class="c"># MayaChemTools is distributed in the hope that it will be useful, but without</span>
32 19 <span class="c"># any warranty; without even the implied warranty of merchantability of fitness</span>
33 20 <span class="c"># for a particular purpose. See the GNU Lesser General Public License for more</span>
34 21 <span class="c"># details.</span>
35 22 <span class="c">#</span>
36 23 <span class="c"># You should have received a copy of the GNU Lesser General Public License</span>
37 24 <span class="c"># along with MayaChemTools; if not, see &lt;http://www.gnu.org/licenses/&gt; or</span>
38 25 <span class="c"># write to the Free Software Foundation Inc., 59 Temple Place, Suite 330,</span>
39 26 <span class="c"># Boston, MA, 02111-1307, USA.</span>
40 27 <span class="c">#</span>
41 28
42 29 <span class="k">use</span> <span class="w">strict</span><span class="sc">;</span>
43 30 <span class="k">use</span> <span class="w">Carp</span><span class="sc">;</span>
44 31 <span class="k">use</span> <span class="w">Exporter</span><span class="sc">;</span>
45 32 <span class="k">use</span> <span class="w">Scalar::Util</span> <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
46 33 <span class="k">use</span> <span class="w">TextUtil</span> <span class="s">(</span><span class="s">)</span><span class="sc">;</span>
47 34 <span class="k">use</span> <span class="w">Atom</span><span class="sc">;</span>
48 35 <span class="k">use</span> <span class="w">Molecule</span><span class="sc">;</span>
49 36 <span class="k">use</span> <span class="w">MolecularDescriptors::MolecularDescriptors</span><span class="sc">;</span>
50 37
51 38 <span class="k">use</span> <span class="w">vars</span> <span class="q">qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS)</span><span class="sc">;</span>
52 39
53 40 <span class="i">@ISA</span> = <span class="q">qw(MolecularDescriptors::MolecularDescriptors Exporter)</span><span class="sc">;</span>
54 41 <span class="i">@EXPORT</span> = <span class="q">qw()</span><span class="sc">;</span>
55 42 <span class="i">@EXPORT_OK</span> = <span class="q">qw(GetDescriptorNames)</span><span class="sc">;</span>
56 43
57 44 <span class="i">%EXPORT_TAGS</span> = <span class="s">(</span><span class="w">all</span> <span class="cm">=&gt;</span> <span class="s">[</span><span class="i">@EXPORT</span><span class="cm">,</span> <span class="i">@EXPORT_OK</span><span class="s">]</span><span class="s">)</span><span class="sc">;</span>
58 45
59 46 <span class="c"># Setup class variables...</span>
60 47 <span class="k">my</span><span class="s">(</span><span class="i">$ClassName</span><span class="cm">,</span> <span class="i">@DescriptorNames</span><span class="s">)</span><span class="sc">;</span>
61 48 <span class="i">_InitializeClass</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
62 49
63 50 <span class="c"># Overload Perl functions...</span>
64 51 <span class="k">use</span> <span class="w">overload</span> <span class="q">&#39;&quot;&quot;&#39;</span> <span class="cm">=&gt;</span> <span class="q">&#39;StringifyRotatableBondsDescriptors&#39;</span><span class="sc">;</span>
65 52
66 53 <span class="c"># Class constructor...</span>
67 <a name="new-"></a> 54 <span class="k">sub </span><span class="m">new</span> <span class="s">{</span>
68 55 <span class="k">my</span><span class="s">(</span><span class="i">$Class</span><span class="cm">,</span> <span class="i">%NamesAndValues</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
69 56
70 57 <span class="c"># Initialize object...</span>
71 58 <span class="k">my</span> <span class="i">$This</span> = <span class="i">$Class</span><span class="i">-&gt;SUPER::new</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
72 59 <span class="k">bless</span> <span class="i">$This</span><span class="cm">,</span> <span class="k">ref</span><span class="s">(</span><span class="i">$Class</span><span class="s">)</span> || <span class="i">$Class</span><span class="sc">;</span>
73 60 <span class="i">$This</span><span class="i">-&gt;_InitializeRotatableBondsDescriptors</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
74 61
75 62 <span class="i">$This</span><span class="i">-&gt;_InitializeRotatableBondsDescriptorsProperties</span><span class="s">(</span><span class="i">%NamesAndValues</span><span class="s">)</span><span class="sc">;</span>
76 63
77 64 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
78 65 <span class="s">}</span>
79 66
80 67 <span class="c"># Initialize class ...</span>
81 <a name="_InitializeClass-"></a> 68 <span class="k">sub </span><span class="m">_InitializeClass</span> <span class="s">{</span>
82 69 <span class="c">#Class name...</span>
83 70 <span class="i">$ClassName</span> = <span class="w">__PACKAGE__</span><span class="sc">;</span>
84 71
85 72 <span class="c"># Descriptor names...</span>
86 73 <span class="i">@DescriptorNames</span> = <span class="s">(</span><span class="q">&#39;RotatableBonds&#39;</span><span class="s">)</span><span class="sc">;</span>
87 74
88 75 <span class="s">}</span>
89 76
90 77 <span class="c"># Get descriptor names as an array.</span>
91 78 <span class="c">#</span>
92 79 <span class="c"># This functionality can be either invoked as a class function or an</span>
93 80 <span class="c"># object method.</span>
94 81 <span class="c">#</span>
95 <a name="GetDescriptorNames-"></a> 82 <span class="k">sub </span><span class="m">GetDescriptorNames</span> <span class="s">{</span>
96 83 <span class="k">return</span> <span class="i">@DescriptorNames</span><span class="sc">;</span>
97 84 <span class="s">}</span>
98 85
99 86 <span class="c"># Initialize object data...</span>
100 87 <span class="c">#</span>
101 <a name="_InitializeRotatableBondsDescriptors-"></a> 88 <span class="k">sub </span><span class="m">_InitializeRotatableBondsDescriptors</span> <span class="s">{</span>
102 89 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
103 90
104 91 <span class="c"># Type of MolecularDescriptor...</span>
105 92 <span class="i">$This</span>-&gt;{<span class="w">Type</span>} = <span class="q">&#39;RotatableBonds&#39;</span><span class="sc">;</span>
106 93
107 94 <span class="c"># MayaChemTools rotatable bonds default definition corresponds to modifed</span>
108 95 <span class="c"># version of rotatable bonds definition used by Veber et al. [ Ref 92 ]</span>
109 96 <span class="c">#</span>
110 97 <span class="i">$This</span>-&gt;{<span class="w">IgnoreTerminalBonds</span>} = <span class="n">1</span><span class="sc">;</span>
111 98 <span class="i">$This</span>-&gt;{<span class="w">IgnoreBondsToTripleBonds</span>} = <span class="n">1</span><span class="sc">;</span>
112 99 <span class="i">$This</span>-&gt;{<span class="w">IgnoreAmideBonds</span>} = <span class="n">1</span><span class="sc">;</span>
113 100 <span class="i">$This</span>-&gt;{<span class="w">IgnoreThioamideBonds</span>} = <span class="n">1</span><span class="sc">;</span>
114 101 <span class="i">$This</span>-&gt;{<span class="w">IgnoreSulfonamideBonds</span>} = <span class="n">1</span><span class="sc">;</span>
115 102
116 103 <span class="c"># Intialize descriptor names and values...</span>
117 104 <span class="i">$This</span><span class="i">-&gt;_InitializeDescriptorNamesAndValues</span><span class="s">(</span><span class="i">@DescriptorNames</span><span class="s">)</span><span class="sc">;</span>
118 105
119 106 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
120 107 <span class="s">}</span>
121 108
122 109 <span class="c"># Initialize object properties...</span>
123 110 <span class="c">#</span>
124 <a name="_InitializeRotatableBondsDescriptorsProperties-"></a> 111 <span class="k">sub </span><span class="m">_InitializeRotatableBondsDescriptorsProperties</span> <span class="s">{</span>
125 112 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">%NamesAndValues</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
126 113
127 114 <span class="k">my</span><span class="s">(</span><span class="i">$Name</span><span class="cm">,</span> <span class="i">$Value</span><span class="cm">,</span> <span class="i">$MethodName</span><span class="s">)</span><span class="sc">;</span>
128 115 <span class="k">while</span> <span class="s">(</span><span class="s">(</span><span class="i">$Name</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span> = <span class="k">each</span> <span class="i">%NamesAndValues</span><span class="s">)</span> <span class="s">{</span>
129 116 <span class="i">$MethodName</span> = <span class="q">&quot;Set${Name}&quot;</span><span class="sc">;</span>
130 117 <span class="i">$This</span><span class="i">-&gt;$MethodName</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
131 118 <span class="s">}</span>
132 119
133 120 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
134 121 <span class="s">}</span>
135 122
136 123 <span class="c"># Calculate number of rotatable bonds in a molecule...</span>
137 124 <span class="c">#</span>
138 125 <span class="c"># A rotatable bond is defined as any single bond which is not in a ring</span>
139 126 <span class="c"># and involves only non-hydrogen atoms. By default, the following types</span>
140 127 <span class="c"># of single bonds are not considered rotatable bonds:</span>
141 128 <span class="c">#</span>
142 129 <span class="c"># . Terminal bonds</span>
143 130 <span class="c"># . Bonds attached to triple bonds</span>
144 131 <span class="c"># . Amide C-N bonds</span>
145 132 <span class="c"># . Thioamide C-N bond bonds</span>
146 133 <span class="c"># . Sulfonamide S-N bonds</span>
147 134 <span class="c">#</span>
148 135 <span class="c"># MayaChemTools rotatable bonds default definition corresponds to modifed</span>
149 136 <span class="c"># version of rotatable bonds definition used by Veber et al. [ Ref 92 ]</span>
150 137 <span class="c">#</span>
151 <a name="GenerateDescriptors-"></a> 138 <span class="k">sub </span><span class="m">GenerateDescriptors</span> <span class="s">{</span>
152 139 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
153 140
154 141 <span class="c"># Initialize descriptor values...</span>
155 142 <span class="i">$This</span><span class="i">-&gt;_InitializeDescriptorValues</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
156 143
157 144 <span class="c"># Check availability of molecule...</span>
158 145 <span class="k">if</span> <span class="s">(</span>!<span class="i">$This</span>-&gt;{<span class="w">Molecule</span>}<span class="s">)</span> <span class="s">{</span>
159 146 <span class="w">carp</span> <span class="q">&quot;Warning: ${ClassName}-&gt;GenerateDescriptors: $This-&gt;{Type} molecular descriptors generation didn&#39;t succeed: Molecule data is not available: Molecule object hasn&#39;t been set...&quot;</span><span class="sc">;</span>
160 147 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
161 148 <span class="s">}</span>
162 149
163 150 <span class="c"># Calculate descriptor values...</span>
164 151 <span class="k">if</span> <span class="s">(</span>!<span class="i">$This</span><span class="i">-&gt;_CalculateDescriptorValues</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
165 152 <span class="w">carp</span> <span class="q">&quot;Warning: ${ClassName}-&gt;GenerateDescriptors: $This-&gt;{Type} molecular descriptors generation didn&#39;t succeed: Couldn&#39;t calculate RotatableBonds values...&quot;</span><span class="sc">;</span>
166 153 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
167 154 <span class="s">}</span>
168 155
169 156 <span class="c"># Set final descriptor values...</span>
170 157 <span class="i">$This</span><span class="i">-&gt;_SetFinalDescriptorValues</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
171 158
172 159 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
173 160 <span class="s">}</span>
174 161
175 162 <span class="c"># Calculate RotatableBonds value...</span>
176 163 <span class="c">#</span>
177 <a name="_CalculateDescriptorValues-"></a> 164 <span class="k">sub </span><span class="m">_CalculateDescriptorValues</span> <span class="s">{</span>
178 165 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
179 166 <span class="k">my</span><span class="s">(</span><span class="i">$Bond</span><span class="cm">,</span> <span class="i">$RotatableBonds</span><span class="cm">,</span> <span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span><span class="sc">;</span>
180 167
181 168 <span class="i">$RotatableBonds</span> = <span class="n">0</span><span class="sc">;</span>
182 169
183 170 <span class="j">BOND:</span> <span class="k">for</span> <span class="i">$Bond</span> <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">Molecule</span>}<span class="i">-&gt;GetBonds</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
184 171 <span class="c"># Is it a non-ring ring bond?</span>
185 172 <span class="k">if</span> <span class="s">(</span>!<span class="i">$Bond</span><span class="i">-&gt;IsSingle</span><span class="s">(</span><span class="s">)</span> || <span class="i">$Bond</span><span class="i">-&gt;IsInRing</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
186 173 <span class="k">next</span> <span class="j">BOND</span><span class="sc">;</span>
187 174 <span class="s">}</span>
188 175
189 176 <span class="s">(</span><span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span> = <span class="i">$Bond</span><span class="i">-&gt;GetAtoms</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
190 177
191 178 <span class="c"># Does bond contain any Hydrogen atoms?</span>
192 179 <span class="k">if</span> <span class="s">(</span><span class="i">$Atom1</span><span class="i">-&gt;IsHydrogen</span><span class="s">(</span><span class="s">)</span> || <span class="i">$Atom2</span><span class="i">-&gt;IsHydrogen</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
193 180 <span class="k">next</span> <span class="j">BOND</span><span class="sc">;</span>
194 181 <span class="s">}</span>
195 182
196 183 <span class="c"># Check for terminal bonds...</span>
197 184 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreTerminalBonds</span>} &amp;&amp; <span class="i">$This</span><span class="i">-&gt;_IsTerminalBond</span><span class="s">(</span><span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
198 185 <span class="k">next</span> <span class="j">BOND</span><span class="sc">;</span>
199 186 <span class="s">}</span>
200 187
201 188 <span class="c"># Check for bonds attached to triple bonds...</span>
202 189 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreBondsToTripleBonds</span>} &amp;&amp; <span class="i">$This</span><span class="i">-&gt;_IsAttachedToTripleBond</span><span class="s">(</span><span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
203 190 <span class="k">next</span> <span class="j">BOND</span><span class="sc">;</span>
204 191 <span class="s">}</span>
205 192
206 193 <span class="c"># Check for amide bonds...</span>
207 194 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreAmideBonds</span>} &amp;&amp; <span class="i">$This</span><span class="i">-&gt;_IsAmideBond</span><span class="s">(</span><span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
208 195 <span class="k">next</span> <span class="j">BOND</span><span class="sc">;</span>
209 196 <span class="s">}</span>
210 197
211 198 <span class="c"># Check for amide bonds...</span>
212 199 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreThioamideBonds</span>} &amp;&amp; <span class="i">$This</span><span class="i">-&gt;_IsThioamideBond</span><span class="s">(</span><span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
213 200 <span class="k">next</span> <span class="j">BOND</span><span class="sc">;</span>
214 201 <span class="s">}</span>
215 202
216 203 <span class="c"># Check for sulfonamide bonds...</span>
217 204 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreSulfonamideBonds</span>} &amp;&amp; <span class="i">$This</span><span class="i">-&gt;_IsSulfonamideBond</span><span class="s">(</span><span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
218 205 <span class="k">next</span> <span class="j">BOND</span><span class="sc">;</span>
219 206 <span class="s">}</span>
220 207
221 208 <span class="i">$RotatableBonds</span> += <span class="n">1</span><span class="sc">;</span>
222 209 <span class="s">}</span>
223 210
224 211 <span class="c"># Track the calculated values...</span>
225 212 <span class="i">$This</span>-&gt;{<span class="w">RotatableBonds</span>} = <span class="i">$RotatableBonds</span><span class="sc">;</span>
226 213
227 214 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
228 215 <span class="s">}</span>
229 216
230 217 <span class="c"># Is it a terminal bond?</span>
231 218 <span class="c">#</span>
232 <a name="_IsTerminalBond-"></a> 219 <span class="k">sub </span><span class="m">_IsTerminalBond</span> <span class="s">{</span>
233 220 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
234 221
235 222 <span class="k">return</span> <span class="s">(</span><span class="i">$Atom1</span><span class="i">-&gt;GetAtomicInvariantValue</span><span class="s">(</span><span class="q">&#39;X&#39;</span><span class="s">)</span> &lt;= <span class="n">1</span> || <span class="i">$Atom2</span><span class="i">-&gt;GetAtomicInvariantValue</span><span class="s">(</span><span class="q">&#39;X&#39;</span><span class="s">)</span> &lt;= <span class="n">1</span> <span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
236 223 <span class="s">}</span>
237 224
238 225 <span class="c"># Is it attached to a terminal bond?</span>
239 226 <span class="c">#</span>
240 <a name="_IsAttachedToTripleBond-"></a> 227 <span class="k">sub </span><span class="m">_IsAttachedToTripleBond</span> <span class="s">{</span>
241 228 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
242 229
243 230 <span class="k">return</span> <span class="s">(</span><span class="i">$Atom1</span><span class="i">-&gt;GetAtomicInvariantValue</span><span class="s">(</span><span class="q">&#39;LBO&#39;</span><span class="s">)</span> == <span class="n">3</span> || <span class="i">$Atom2</span><span class="i">-&gt;GetAtomicInvariantValue</span><span class="s">(</span><span class="q">&#39;LBO&#39;</span><span class="s">)</span> == <span class="n">3</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
244 231 <span class="s">}</span>
245 232
246 233 <span class="c"># Is it an amide bond?</span>
247 234 <span class="c">#</span>
248 235 <span class="c"># Amide: R-C(=O)-N(-R)(-R&quot;)</span>
249 236 <span class="c">#</span>
250 <a name="_IsAmideBond-"></a> 237 <span class="k">sub </span><span class="m">_IsAmideBond</span> <span class="s">{</span>
251 238 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
252 239 <span class="k">my</span><span class="s">(</span><span class="i">$CarbonAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span><span class="sc">;</span>
253 240
254 241 <span class="s">(</span><span class="i">$CarbonAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span> = <span class="s">(</span><span class="k">undef</span><span class="cm">,</span> <span class="k">undef</span><span class="s">)</span><span class="sc">;</span>
255 242
256 243 <span class="k">if</span> <span class="s">(</span><span class="i">$Atom1</span><span class="i">-&gt;IsCarbon</span><span class="s">(</span><span class="s">)</span> &amp;&amp; <span class="i">$Atom2</span><span class="i">-&gt;IsNitrogen</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
257 244 <span class="s">(</span><span class="i">$CarbonAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span> = <span class="s">(</span><span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span><span class="sc">;</span>
258 245 <span class="s">}</span>
259 246 <span class="k">elsif</span> <span class="s">(</span><span class="i">$Atom2</span><span class="i">-&gt;IsCarbon</span><span class="s">(</span><span class="s">)</span> &amp;&amp; <span class="i">$Atom1</span><span class="i">-&gt;IsNitrogen</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
260 247 <span class="s">(</span><span class="i">$CarbonAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span> = <span class="s">(</span><span class="i">$Atom2</span><span class="cm">,</span> <span class="i">$Atom1</span><span class="s">)</span><span class="sc">;</span>
261 248 <span class="s">}</span>
262 249
263 250 <span class="k">if</span> <span class="s">(</span>!<span class="i">$CarbonAtom</span><span class="s">)</span> <span class="s">{</span>
264 251 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span>
265 252 <span class="s">}</span>
266 253
267 254 <span class="k">return</span> <span class="i">$CarbonAtom</span><span class="i">-&gt;DoesAtomNeighborhoodMatch</span><span class="s">(</span><span class="q">&#39;C.T3.DB1&#39;</span><span class="cm">,</span> <span class="s">[</span><span class="q">&#39;O&#39;</span><span class="cm">,</span> <span class="q">&#39;N&#39;</span><span class="cm">,</span> <span class="q">&#39;C,H&#39;</span><span class="s">]</span><span class="cm">,</span> <span class="s">[</span><span class="q">&#39;=&#39;</span><span class="cm">,</span> <span class="q">&#39;-&#39;</span><span class="cm">,</span> <span class="q">&#39;-&#39;</span><span class="s">]</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
268 255 <span class="s">}</span>
269 256
270 257 <span class="c"># Is it a thioamide bond?</span>
271 258 <span class="c">#</span>
272 259 <span class="c"># Thioamide: R-C(=S)-N(-R)(-R&quot;)</span>
273 260 <span class="c">#</span>
274 <a name="_IsThioamideBond-"></a> 261 <span class="k">sub </span><span class="m">_IsThioamideBond</span> <span class="s">{</span>
275 262 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
276 263 <span class="k">my</span><span class="s">(</span><span class="i">$CarbonAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span><span class="sc">;</span>
277 264
278 265 <span class="s">(</span><span class="i">$CarbonAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span> = <span class="s">(</span><span class="k">undef</span><span class="cm">,</span> <span class="k">undef</span><span class="s">)</span><span class="sc">;</span>
279 266
280 267 <span class="k">if</span> <span class="s">(</span><span class="i">$Atom1</span><span class="i">-&gt;IsCarbon</span><span class="s">(</span><span class="s">)</span> &amp;&amp; <span class="i">$Atom2</span><span class="i">-&gt;IsNitrogen</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
281 268 <span class="s">(</span><span class="i">$CarbonAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span> = <span class="s">(</span><span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span><span class="sc">;</span>
282 269 <span class="s">}</span>
283 270 <span class="k">elsif</span> <span class="s">(</span><span class="i">$Atom2</span><span class="i">-&gt;IsCarbon</span><span class="s">(</span><span class="s">)</span> &amp;&amp; <span class="i">$Atom1</span><span class="i">-&gt;IsNitrogen</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
284 271 <span class="s">(</span><span class="i">$CarbonAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span> = <span class="s">(</span><span class="i">$Atom2</span><span class="cm">,</span> <span class="i">$Atom1</span><span class="s">)</span><span class="sc">;</span>
285 272 <span class="s">}</span>
286 273
287 274 <span class="k">if</span> <span class="s">(</span>!<span class="i">$CarbonAtom</span><span class="s">)</span> <span class="s">{</span>
288 275 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span>
289 276 <span class="s">}</span>
290 277
291 278 <span class="k">return</span> <span class="i">$CarbonAtom</span><span class="i">-&gt;DoesAtomNeighborhoodMatch</span><span class="s">(</span><span class="q">&#39;C.T3.DB1&#39;</span><span class="cm">,</span> <span class="s">[</span><span class="q">&#39;S&#39;</span><span class="cm">,</span> <span class="q">&#39;N&#39;</span><span class="cm">,</span> <span class="q">&#39;C,H&#39;</span><span class="s">]</span><span class="cm">,</span> <span class="s">[</span><span class="q">&#39;=&#39;</span><span class="cm">,</span> <span class="q">&#39;-&#39;</span><span class="cm">,</span> <span class="q">&#39;-&#39;</span><span class="s">]</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
292 279 <span class="s">}</span>
293 280
294 281 <span class="c"># Is it a sulfonamide bond?</span>
295 282 <span class="c">#</span>
296 283 <span class="c"># Sulfonamide: R-S(=O)(=O)-N(-R)(-R&quot;)</span>
297 284 <span class="c">#</span>
298 <a name="_IsSulfonamideBond-"></a> 285 <span class="k">sub </span><span class="m">_IsSulfonamideBond</span> <span class="s">{</span>
299 286 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
300 287 <span class="k">my</span><span class="s">(</span><span class="i">$SulfurAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span><span class="sc">;</span>
301 288
302 289 <span class="s">(</span><span class="i">$SulfurAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span> = <span class="s">(</span><span class="k">undef</span><span class="cm">,</span> <span class="k">undef</span><span class="s">)</span><span class="sc">;</span>
303 290
304 291 <span class="k">if</span> <span class="s">(</span><span class="i">$Atom1</span><span class="i">-&gt;IsSulfur</span><span class="s">(</span><span class="s">)</span> &amp;&amp; <span class="i">$Atom2</span><span class="i">-&gt;IsNitrogen</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
305 292 <span class="s">(</span><span class="i">$SulfurAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span> = <span class="s">(</span><span class="i">$Atom1</span><span class="cm">,</span> <span class="i">$Atom2</span><span class="s">)</span><span class="sc">;</span>
306 293 <span class="s">}</span>
307 294 <span class="k">elsif</span> <span class="s">(</span><span class="i">$Atom2</span><span class="i">-&gt;IsSulfur</span><span class="s">(</span><span class="s">)</span> &amp;&amp; <span class="i">$Atom1</span><span class="i">-&gt;IsNitrogen</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
308 295 <span class="s">(</span><span class="i">$SulfurAtom</span><span class="cm">,</span> <span class="i">$NitrogenAtom</span><span class="s">)</span> = <span class="s">(</span><span class="i">$Atom2</span><span class="cm">,</span> <span class="i">$Atom1</span><span class="s">)</span><span class="sc">;</span>
309 296 <span class="s">}</span>
310 297
311 298 <span class="k">if</span> <span class="s">(</span>!<span class="i">$SulfurAtom</span><span class="s">)</span> <span class="s">{</span>
312 299 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span>
313 300 <span class="s">}</span>
314 301
315 302 <span class="k">return</span> <span class="i">$SulfurAtom</span><span class="i">-&gt;DoesAtomNeighborhoodMatch</span><span class="s">(</span><span class="q">&#39;S.T4.DB2&#39;</span><span class="cm">,</span> <span class="s">[</span><span class="q">&#39;O&#39;</span><span class="cm">,</span> <span class="q">&#39;O&#39;</span><span class="cm">,</span> <span class="q">&#39;N&#39;</span><span class="cm">,</span> <span class="q">&#39;!O&#39;</span><span class="s">]</span><span class="cm">,</span> <span class="s">[</span><span class="q">&#39;=&#39;</span><span class="cm">,</span> <span class="q">&#39;=&#39;</span><span class="cm">,</span> <span class="q">&#39;-&#39;</span><span class="cm">,</span> <span class="q">&#39;-&#39;</span><span class="s">]</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
316 303 <span class="s">}</span>
317 304
318 305 <span class="c"># Setup final descriptor values...</span>
319 306 <span class="c">#</span>
320 <a name="_SetFinalDescriptorValues-"></a> 307 <span class="k">sub </span><span class="m">_SetFinalDescriptorValues</span> <span class="s">{</span>
321 308 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
322 309
323 310 <span class="i">$This</span>-&gt;{<span class="w">DescriptorsGenerated</span>} = <span class="n">1</span><span class="sc">;</span>
324 311
325 312 <span class="i">$This</span><span class="i">-&gt;SetDescriptorValues</span><span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">RotatableBonds</span>}<span class="s">)</span><span class="sc">;</span>
326 313
327 314 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
328 315 <span class="s">}</span>
329 316
330 317 <span class="c"># Return a string containg data for RotatableBondsDescriptors object...</span>
331 318 <span class="c">#</span>
332 <a name="StringifyRotatableBondsDescriptors-"></a> 319 <span class="k">sub </span><span class="m">StringifyRotatableBondsDescriptors</span> <span class="s">{</span>
333 320 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
334 321 <span class="k">my</span><span class="s">(</span><span class="i">$RotatableBondsDescriptorsString</span><span class="s">)</span><span class="sc">;</span>
335 322
336 323 <span class="c"># Type of MolecularDescriptors...</span>
337 324 <span class="i">$RotatableBondsDescriptorsString</span> = <span class="q">&quot;MolecularDescriptorType: $This-&gt;{Type}; IgnoreTerminalBonds: &quot;</span> . <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreTerminalBonds</span>} ? <span class="q">&quot;Yes&quot;</span> <span class="co">:</span> <span class="q">&quot;No&quot;</span><span class="s">)</span> . <span class="q">&quot;; IgnoreBondsToTripleBonds: &quot;</span> . <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreBondsToTripleBonds</span>} ? <span class="q">&quot;Yes&quot;</span> <span class="co">:</span> <span class="q">&quot;No&quot;</span><span class="s">)</span> . <span class="q">&quot;; IgnoreAmideBonds: &quot;</span> . <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreAmideBonds</span>} ? <span class="q">&quot;Yes&quot;</span> <span class="co">:</span> <span class="q">&quot;No&quot;</span><span class="s">)</span> . <span class="q">&quot;; IgnoreThioamideBonds: &quot;</span> . <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreThioamideBonds</span>} ? <span class="q">&quot;Yes&quot;</span> <span class="co">:</span> <span class="q">&quot;No&quot;</span><span class="s">)</span> . <span class="q">&quot;; IgnoreSulfonamideBonds: &quot;</span> . <span class="s">(</span><span class="i">$This</span>-&gt;{<span class="w">IgnoreSulfonamideBonds</span>} ? <span class="q">&quot;Yes&quot;</span> <span class="co">:</span> <span class="q">&quot;No&quot;</span><span class="s">)</span><span class="sc">;</span>
338 325
339 326 <span class="c"># Setup molecular descriptor information...</span>
340 327 <span class="i">$RotatableBondsDescriptorsString</span> .= <span class="q">&quot;; &quot;</span> . <span class="i">$This</span><span class="i">-&gt;_StringifyDescriptorNamesAndValues</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span>
341 328
342 329 <span class="k">return</span> <span class="i">$RotatableBondsDescriptorsString</span><span class="sc">;</span>
343 330 <span class="s">}</span>
344 331
345 332 <span class="c"># Is it a RotatableBondsDescriptors object?</span>
346 <a name="_IsRotatableBondsDescriptors-"></a> 333 <span class="k">sub </span><span class="m">_IsRotatableBondsDescriptors</span> <span class="s">{</span>
347 334 <span class="k">my</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
348 335
349 336 <span class="k">return</span> <span class="s">(</span><span class="i">Scalar::Util::blessed</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> &amp;&amp; <span class="i">$Object</span><span class="i">-&gt;isa</span><span class="s">(</span><span class="i">$ClassName</span><span class="s">)</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
350 337 <span class="s">}</span>
351 338
352 <a name="EOF-"></a></pre>
353 <p>&nbsp;</p>
354 <br />
355 <center>
356 <img src="../../../images/h2o2.png">
357 </center>
358 </body>
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