The molecule is a 6-oxo monocarboxylic acid anion. It derives from a sorbate. It is a conjugate base of a 2-hydroxy-6-(2-hydroxyphenoxy)-6-oxo-cis,cis-hexa-2,4-dienoic acid.
(2E,4Z)-1-hydroxy-6-(2-hydroxyphenoxy)-1,6-dioxohexa-2,4-dien-2-olate