SMILES: COC(=O)C/C(=C\\C(=O)[O-])/C(=O)[O-]
Description: The molecule is dianion of (2E)-2-(methoxycarbonylmethyl)but-2-enedioic acid arising from deprotonation of both carboxylic acid functions. It is a conjugate base of a (2E)-2-(methoxycarbonylmethyl)but-2-enedioic acid.