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Zeinoxanthin is an antioxidant carotenoid found in various foods such as oranges as well as in the tissues of the human eye.

ChEBI: Zeinoxanthin is a carotenol, the structure of which is (6'R)-beta,epsilon-carotene hydroxy-substituted at C-3 with R-stereochemistry. It derives from a hydride of a (6'R)-beta,epsilon-carotene.

It crystallises from *C6H6/MeOH in red needles. The racemate is purified through an Al2O3 column, eluting with *C6H6 and recrystallising from MeOH/Et2O. It has λmax (ε 10-3) (hexane) at 421, 444, 471nm (90, 133, 122). [Loeber et al. J Chem Soc (C) 404 1971, Goodfellow et al. J Chem Soc, Chem Commun 1578 1970, Beilstein 6 IV 5113.]