The style file `aliphat.sty' contains the following
commands
%
% <Macros for tetravalent atoms>
%
% \tetrahedral \@tetrahedral
% \square \@square
%
% <Macros for trivalent atoms>
%
% \rtrigonal \@rtrigonal
% \ltrigonal \@ltrigonal
% \utrigonal \@utrigonal
% \Utrigonal \@Utrigonal
% \dtrigonal \@dtrigonal
% \Dtrigonal \@Dtrigonal
%
% <Macros for two-carbon compounds>
%
% \ethylene \@ethylene
% \ethylenev \@ethylenev
% \Ethylenev \@Ethylenev
%
% <Macros for stereo-projection>
%
% \tetrastereo \@tetrastereo
% \dtetrastereo \@dtetrastereo
% \ethanestereo \@ethanestereo
%