title: Characterization of fucoxanthin and fucoxanthinol esters in the Chinese surf clam, Mactra chinensis.
abstract: Fucoxanthin and fucoxanthinol fatty acid esters in the clam, Mactra chinensis, were characterized on the basis of 1H NMR and FAB-MS spectra. 1H NMR revealed that the hydroxy group at C-3 in fucoxanthin and fucoxanthinol was acylated. 3'-O-Acylated compounds such as fucoxanthinol 3'-ester or fucoxanthinol 3,3'-diester were not found in the clam. The fatty acids esterified with fucoxanthin and fucoxanthinol were identified as C24:6, C22:5, C22:6, C20:5, C20:0, C20:1, C18:0, C18:1, C16:0, C16:1, and C14:0 by FAB-MS data.
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: 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: D000215:Acylation; D000818:Animals; D049872:Bivalvia / Q000737:chemistry*; D004952:Esters / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D016339:Spectrometry, Mass, Fast Atom Bombardment; D024341:Xanthophylls / Q000032:analysis / Q000737:chemistry*; D019207:beta Carotene / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry
chemical_list: D004952:Esters; D024341:Xanthophylls; D019207:beta Carotene; C025164:fucoxanthin; C483031:fucoxanthinol