SMILES: C(/C=C\\CC(=O)[O-])C(=O)C(=O)[O-]
Description: The molecule is a dicarboxylic acid dianion obtained by deprotonation of the carboxy groups of (4Z)-2-oxohept-4-enedioic acid; major species at pH 7.3. It is a conjugate base of a (4Z)-2-oxohept-4-enedioic acid. It is a tautomer of a (2Z,4Z)-2-hydroxyhepta-2,4-dienedioate.