The molecule is a hydroxy monocarboxylic acid anion obtained by deprotonation of the carboxy group of (2E,4Z)-2-hydroxy-7-methyl-6-oxo-2,4-octadienoic acid; major species at pH 7.3. It is a hydroxy monocarboxylic acid anion and a 6-oxo monocarboxylic acid anion. It is a conjugate base of a (2E,4Z)-2-hydroxy-7-methyl-6-oxo-2,4-octadienoic acid.
(2E,4Z)-1-hydroxy-7-methyl-1,6-dioxoocta-2,4-dien-2-olate