The molecule is a monocarboxylic acid anion resulting from the deprotonation of the carboxy group of neurosporaxanthin. The major species at pH 7.3. It is a conjugate base of a neurosporaxanthin.
(2E,4E,6E,8E,10E,12E,14E,16E,18E,20E)-2,6,10,15,19-pentamethyl-21-(2,6,6-trimethylcyclohexen-1-yl)henicosa-2,4,6,8,10,12,14,16,18,20-decaenoate