The molecule is an apo carotenoid sesquiterpenoid and an alpha,beta-unsaturated monocarboxylic acid. It has a role as a metabolite. It is a conjugate acid of a phaseic acid anion.
(2Z,4E)-5-[(1R,5R,8S)-8-hydroxy-1,5-dimethyl-3-oxo-6-oxabicyclo[3.2.1]octan-8-yl]-3-methylpenta-2,4-dienoic acid