OESetComment
OESetComment(mol: Union[OEGraphMol,OEMol,OEQMol], c: str) -> None
Attaches a text comment to a molecule. This comment will be written
to the comment field of the .mol2 and .sdf molecular formats. It will
also be conserved in OEBinary format. This property may be retrieved
using the OEGetComment function.