title: Carotenoids and their fatty acid esters of spiny lobster Panulirus japonicus.
abstract: Carotenoids and their fatty acid esters in the carapace of the spiny lobster Panulirus japonicus were investigated. Fatty acid esters of astaxanthin, adonixanthin, and pectenolone were characterized by (1)H-NMR and FAB-MS. The acylated position of adonixanthin and pectenolone monoesters was determined to be a hydroxy group at C-3' by (1)H-NMR. The fatty acids esterified with these carotenoids were identified as C22:6, C20:4, C20:5, C18:0, C18:1, C17:0, C16:0, C16:1, C14:0, and C12:0 from FAB-MS spectral data. Furthermore, 2,3-didehydrocanthaxanthin (4) was first identified as a natural product.
authors.affiliation: Research Institute for Production Development, Kyoto, 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
mesh_terms: D000818:Animals; D002338:Carotenoids / Q000032:analysis* / Q000737:chemistry*; D004952:Esters; D005227:Fatty Acids / Q000032:analysis* / Q000737:chemistry*; D033521:Palinuridae
chemical_list: D004952:Esters; D005227:Fatty Acids; D002338:Carotenoids