The molecule is a dicarboxylic acid that is 2-hydroxyhepta-2,4-diene in which the two terminal methyl groups are replaced by carboxy groups (the 2Z,4Z-geoisomer). It is an enol and a polyunsaturated dicarboxylic acid. It is a conjugate acid of a (2Z,4Z)-2-hydroxyhepta-2,4-dienedioate. It is a tautomer of a (4Z)-2-oxohept-4-enedioic acid.
(2Z,4Z)-2-hydroxyhepta-2,4-dienedioic acid