5 # Example file for 'chem':
7 # This originates from Computing Science Technical Report No. 122
8 # CHEM - A Program for Typesetting Chemical Diagrams: User Manual
9 # by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
10 # <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
12 # Copyright (C) 2006-2018 Free Software Foundation, Inc.
14 # This file is part of 'chem', which is part of 'groff'.
16 # 'groff' is free software; you can redistribute it and/or modify it
17 # under the terms of the GNU General Public License (GPL) version 2 as
18 # published by the Free Software Foundation.
20 # 'groff' is distributed in the hope that it will be useful, but
21 # WITHOUT ANY WARRANTY; without even the implied warranty of
22 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 # General Public License for more details.
25 # You should have received a copy of the GNU General Public License
26 # along with this program. If not, see <http://www.gnu.org/licenses/>.
28 # The GPL2 license text is available in the internet at
29 # <http://www.gnu.org/licenses/gpl-2.0.html>.
31 ########################################################################
34 "R1" at R1 # this puts a label at R1
35 front bond -120 from R1.V5 ; HO
36 # the following line says "fuse the next six-
37 # membered ring with its 6th vertex joining
38 # the second vertex of R1"
39 R2: ring6 with .V6 at R1.V2
40 front bond up from R2.V6 ; CH3
41 back bond down from R2.V4 ; H
42 back bond down from R2.V1 ; H
43 front bond up from R2.V2 ; H
44 R3: ring6 with .V4 at R2.V2
45 R4: flatring with .V5 at R3.V2
46 front bond up from R4.V5 ; CH3
47 back bond down from R4.V4 ; H # this is the alkyl chain
48 bond up from R4.V1 ; BP
57 ########################################################################