The molecule is a 2-hydroxy-6-oxo-2,4-heptadienoate which has 2Z,4E configuration. Obtained by deprotonation of the carboxy group of (2Z,4E)-2-hydroxy-6-oxohepta-2,4-dienoic acid, it is the major species at pH 7.3. It is a conjugate base of a (2Z,4E)-2-hydroxy-6-oxohepta-2,4-dienoic acid.
(2Z,4E)-1-hydroxy-1,6-dioxohepta-2,4-dien-2-olate