SMILES: C(/C=C/C(=O)C(=O)[O-])C(=O)[O-]
Description: The molecule is the oxo dicarboxylate dianion that is hex-3-enedioate oxo-substituted at C-2; the stereochemistry of the C=C double bond is unspecified. It is a conjugate base of a 2-oxohex-3-enedioic acid.