The molecule is a hydroxy monocarboxylic acid anion obtained by deprotonation of the carboxy group of 2-hydroxy-6-oxonona-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-oxonona-2,4-dienoic acid.
(2Z,4E)-1-hydroxy-1,6-dioxonona-2,4-dien-2-olate