The molecule is an oxo dicarboxylic acid that is (Z)-2-hexenedioic acid in which the hydrogens at position 5 are substituted by an oxo group. It derives from a 2-hexenedioic acid. It is a conjugate acid of a (Z)-5-oxohex-2-enedioate.
(Z)-5-oxohex-2-enedioic acid