usage: chem [file ...]
usage: chem { -v | --version }
usage: chem { -h | --help }
chem is a groff(1) preprocessor for producing chemical structure
diagrams. It produces input for the pic(1) preprocessor. See the
chem(1) manual page.
GNU troff text-formatting system
From groff 1.25.0-r0 (os), captured 2026-11-10 by running chem --help (exit 0). permalink
usage: chem [file ...]
usage: chem { -v | --version }
usage: chem { -h | --help }
chem is a groff(1) preprocessor for producing chemical structure
diagrams. It produces input for the pic(1) preprocessor. See the
chem(1) manual page.