SMILES: C/C(=C(\\C)/C(=O)[O-])/C(=O)[O-]
Description: The molecule is a dicarboxylic acid dianion that is obtained from dimethylmaleic acid by removal of a proton from each of the carboxylic acid groups. It derives from a maleate(2-). It is a conjugate base of a dimethylmaleic acid.