CAS: 328-42-7 Molecular Formula: C4H4O5 Molecular Weight (g/mol): 132.071 InChI Key: KHPXUQMNIQBQEV-UHFFFAOYSA-N Synonym: oxalacetic acid,oxaloacetic acid,2-oxosuccinic acid,oxaloacetate,ketosuccinic acid,oxosuccinic acid,2-ketosuccinic acid,butanedioic acid, oxo,oxobutanedioic acid,oxalacetate PubChem CID: 970 ChEBI: CHEBI:30744 IUPAC Name: 2-oxobutanedioic acid SMILES: C(C(=O)C(=O)O)C(=O)O