The molecule is a hydroxy monocarboxylic acid anion obtained by deprotonation of the carboxy groups of 2-hydroxy-3-carboxy-6-oxo-7-methylocta-2,4-dienoic acid; major species at pH 7.3. It derives from an octa-2,4-dienoate. It is a conjugate base of a 2-hydroxy-3-carboxy-6-oxo-7-methylocta-2,4-dienoic acid.
(Z,2Z)-2-[carboxy(oxido)methylidene]-6-methyl-5-oxohept-3-enoate