The molecule is a dicarboxylic acid dianion obtained by deprotonation of both carboxy groups of 3-[(1-carboxyvinyl)oxy]benzoic acid; major species at pH 7.3. It is a conjugate base of a 3-[(1-carboxyvinyl)oxy]benzoic acid.
3-(1-carboxylatoethenoxy)benzoate