title: Structure of new carotenoids with the 6-oxo-kappa end group from the fruits of paprika, Capsicum annuum.
abstract: New carotenoids 1 and 2 were isolated as minor components from the ripe fruits of paprika (Capsicum annuum). The structures of 1 and 2 were determined to be (3R,5'R)-3-hydroxy-beta,kappa-caroten-6'-one and (5'R)-3,4-didehydro-beta,kappa-caroten-6'-one, respectively, from UV-vis, NMR, CD, HRFABMS, and FABMS/MS spectra.
authors.affiliation: Research Institute for Production Development, 15 Shimogamo-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: Naoshige
authors.initials: N
authors.lastname: Akimoto
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Fujiwara
authors.forename: Keiji
authors.initials: K
authors.lastname: Hashimoto
mesh_terms: D002212:Capsicum / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry; D007564:Japan; D013058:Mass Spectrometry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D013237:Stereoisomerism; D019207:beta Carotene / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C483263:(3R,5'R)-3-hydroxy-beta,kappa-caroten-6'-one; C483264:(5'R)-3,4-didehydro-beta,kappa-caroten-6'-one; D019207:beta Carotene