extension of SMILES for specification of substructural queries SYBYL Line Notation, another line notation International Chemical Identifier (InChI), the IUPAC's alternative to SMILES Molecular Query Language, a query language allowing also numerical properties, e.g. physicochemical values or distances Chemistry Development Kit, 2D layout and conversion software OpenBabel, JOELib, OELib (conversion) References Chemical nomenclature Encodings Chemical file formats