(1S)-3,5,5-trimethyl-4-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyl-18-(2,6,6-trimethyl-1-cyclohexenyl)octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol C??? ??, ??, ??

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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.

Purification Methods

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.]

(1S)-3,5,5-trimethyl-4-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyl-18-(2,6,6-trimethyl-1-cyclohexenyl)octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol ?? ?? ? ???

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?? ??

(1S)-3,5,5-trimethyl-4-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyl-18-(2,6,6-trimethyl-1-cyclohexenyl)octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol ?? ??

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(1S)-3,5,5-trimethyl-4-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyl-18-(2,6,6-trimethyl-1-cyclohexenyl)octadeca-1,3,5,7,9,11,13,15,17-nonaenyl]cyclohex-3-en-1-ol ?? ??: