SMILES: C=C(C(=O)[O-])OP(=O)(C(=O)[O-])[O-]
Description: The molecule is trianion of 1-carboxyvinyl carboxyphosphonate arising from deprotonation of the carboxy and phosphonate groups; major species at pH 7.3. It is a dicarboxylic acid dianion and an organophosphonate oxoanion. It is a conjugate base of a 1-carboxyvinyl carboxyphosphonate.