chem --version (return code: 0)
chem 1.0.5 (Perl version)
is part of groff version 1.22.3.
Copyright (C) 2006-2014 Free Software Foundation, Inc.
GNU groff and chem come with ABSOLUTELY NO WARRANTY.
You may redistribute copies of groff and its subprograms
under the terms of the GNU General Public License.
chem --help (return code: 0)
chem 1.0.5 (Perl version)
is part of groff version 1.22.3.
Copyright (C) 2006-2014 Free Software Foundation, Inc.
GNU groff and chem come with ABSOLUTELY NO WARRANTY.
You may redistribute copies of groff and its subprograms
under the terms of the GNU General Public License.
Usage: chem [option]... [filespec]...
chem is a groff preprocessor for producing chemical structure
diagrams. The output suits to the pic preprocessor.
"filespec" is one of
"filename" name of a readable file
"-" for standard input
All available options are
-h --help print this usage message.
-v --version print version information.