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Dir : ~/usr/share/doc/groff-base/examples/chem/122/

View File Name : ch4p_cholestanol.chem

ch4p_cholestanol.chem:
.br
.cstart

# Example file for 'chem':

# This originates from Computing Science Technical Report No. 122
#   CHEM - A Program for Typesetting Chemical Diagrams: User Manual
#   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
#   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.

# Copyright (C) 2006-2018 Free Software Foundation, Inc.

# This file is part of 'chem', which is part of 'groff'.

# 'groff' is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License (GPL) version 2 as
# published by the Free Software Foundation.

# 'groff' is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# The GPL2 license text is available in the internet at
# <http://www.gnu.org/licenses/gpl-2.0.html>.

########################################################################

R1: ring6
    "R1" at R1     # this puts a label at R1
    front bond -120 from R1.V5 ; HO
         # the following line says "fuse the next six-
         # membered ring with its 6th vertex joining
         # the second vertex of R1"
R2: ring6 with .V6 at R1.V2
    front bond up from R2.V6 ; CH3
    back bond down from R2.V4 ; H
    back bond down from R2.V1 ; H
    front bond up from R2.V2 ; H
R3: ring6 with .V4 at R2.V2
R4: flatring with .V5 at R3.V2
    front bond up from R4.V5 ; CH3
    back bond down from R4.V4 ; H # this is the alkyl chain
    bond up from R4.V1 ; BP
    bond -60 from BP
    bond 60 from BP
    bond 120
    bond 60
    bond 120 ; BP
    bond down from BP
    bond 60 from BP

########################################################################
### Emacs settings
# Local Variables:
# mode: Nroff
# End:
.cend