The package contains mol2chemfig.lua, the Lua web client version of mol2chemfig. It is used from the command line but calls the mol2chemfig server for every request, to convert chemical structures from MDL molfile format or SMILES format to TeX format for processing using chemfig. A full locally installable version (as well as the source code) of the mol2chemfig program is available from the package home page. The full program requires Python and the indigo cheminformatics library for Python. See the docs for additional details.