XyMTeX is a set of packages for drawing a wide variety of chemical structural formulas. The commands have a set of systematic arguments for specifying substituents and their positions, endocyclic double bonds, and bond patterns; in some cases there are additional arguments for the hetero-atoms on the vertices of heterocycles. It is believed that this systematic design allows XyMTeX to operate as a practical (device-independent) tool for use with LaTeX.

See also chemtex.

The author is Shinsaku Fujita. The package is Copyright © 1993-2005,2009 Shinsaku Fujita.