title: 5-Hydroxy-seco-carotenoids from Pittosporum tobira.
abstract: Three 5-hydroxy-seco-carotenoids were isolated from seeds of Pittosporum tobira. These structures were determined to be (3S,3'S,5'?)-3,3'-di(tetradecanoyloxy)-5'-hydroxy-5,6,5',6'-diseco-beta,beta-carotene-5,6,6'-trione (1), (3S,5?,3'S,5'R,6'S,9'Z)-3-tetradecanoyloxy-5',6'-epoxy-5,3'-dihydroxy-5',6'-dihydro-5,6-seco-beta,beta-caroten-6-one (2), and (3S,5?,3'S,5'R,6'R)-3-tetradecanoyloxy-5,3',5'-trihydroxy-6',7'-didehydro-5',6'-dihydro-5,6-seco-beta,beta-caroten-6-one (3) based on analysis of UV-vis, IR, FAB MS, and NMR spectroscopic data.
authors.affiliation: Research Institute for Production Development, 15 Shimogamo-morimoto-cho, Sakyo-ku, Kyoto 606-0805, Japan. maoka@mbox.kyoto-inet.or.jp <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: D002338:Carotenoids / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008968:Molecular Conformation; D015394:Molecular Structure; D019685:Rosales / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry; D016339:Spectrometry, Mass, Fast Atom Bombardment / Q000379:methods
chemical_list: C516015:(3S,3'S,5')-3,3'-di(tetradecanoyloxy)-5'-hydroxy-5,6,5',6'-diseco-beta,beta-carotene-5,6,6'-trione; D002338:Carotenoids