The molecule is a dicarboxylic acid dianion resulting from the removal of a proton from both of the carboxy groups of crocetin. The major species at pH 7.3. It is a conjugate base of a crocetin.
(2E,4E,6E,8E,10E,12E,14E)-2,6,11,15-tetramethylhexadeca-2,4,6,8,10,12,14-heptaenedioate