title: Structure of new carotenoids with a 3,4-dihydroxy-beta-end group from the oyster Crassostrea gigas.
abstract: Three new carotenoids with a 3,4-dihydroxy-beta-end group were isolated from the oyster Crassostrea gigas. These structures were determined to be 3,4,3',8'-tetrahydroxy-beta,kappa-caroten-6'-one (1), 3,4-dihydroxy-3',6'-epoxy-1',2',5',6'7',8'-hexahydro-6'-methyl-16'-nor-beta,-carotene-1',8'-dione (2), and 3,6-epoxy-5,3',4'-trihydroxy-12',13',20'-trinor-beta,beta-caroten-19,11-olide (3) based on chemical and spectral data.
authors.affiliation: Research Institute for Production Development; 15 Shimogama-morimoto-cho, Sakyo-ku, Kyoto 606-0805,Japan. maoka@mbox.kyoto-inet.or.jp
authors.forename: Takashi
authors.initials: T
authors.lastname: Maoka
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Fujiwara
authors.forename: Keiji
authors.initials: K
authors.lastname: Hashimoto
authors.forename: Naoshige
authors.initials: N
authors.lastname: Akimoto
mesh_terms: D000818:Animals; D002338:Carotenoids / Q000737:chemistry*; D010125:Ostreidae / Q000737:chemistry*; D012997:Solvents; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet
chemical_list: C505052:3,4,3',8'-tetrahydroxy-beta,kappa-caroten-6'-one; C505051:3,4-dihydroxy-3',6'-epoxy-1',2',5',6'7',8'-hexahydro-6'-methyl-16'-nor-beta,-carotene-1',8'-dione; C505053:3,6-epoxy-5,3',4'-trihydroxy-12',13',20'-trinor-beta,beta-caroten-19,11-olide; D012997:Solvents; D002338:Carotenoids