The molecule is the conjugate base of 2-hydroxy-6-oxohexa-2,4-dienoic acid; major species at pH 7.3. It is a 6-oxo monocarboxylic acid anion and a hydroxy monocarboxylic acid anion. It is a conjugate base of a 2-hydroxy-6-oxohexa-2,4-dienoic acid.
(1Z,3E)-6-hydroxy-5,6-dioxohexa-1,3-dien-1-olate