The molecule is a C4-dicarboxylate resulting from the removal of a proton from both carboxylic acid groups of enol-oxaloacetic acid. It is a C4-dicarboxylate and a dicarboxylic acid dianion. It derives from a butenedioate. It is a conjugate acid of an enol-oxaloacetic acid.
(Z)-4-hydroxy-2-oxido-4-oxobut-2-enoate