The molecule is a monocarboxylic acid that is (2Z,4E)-hexa-2,4-dienoic acid in which the hydrogen at position 2 is replaced by a hydroxy group. It is an enol and an alpha,beta-unsaturated monocarboxylic acid. It is a conjugate acid of a (2Z,4Z)-2-hydroxyhexa-2,4-dienoate.
(2Z,4Z)-2-hydroxyhexa-2,4-dienoic acid