The molecule is an oxo dicarboxylate obtained by removal of a proton from both of the carboxylic acid groups of (Z)-5-oxohex-2-enedioic acid. It derives from a hex-2-enedioate. It is a conjugate base of a (Z)-5-oxohex-2-enedioic acid.
(Z)-5-oxohex-2-enedioate