title: Amphimelibiosides A-F, six new ceramide dihexosides isolated from a Japanese marine sponge Amphimedon sp.
abstract: Six new ceramide dihexosides, amphimelibiosides A-F (1-6), were isolated from a Japanese marine sponge Amphimedon sp. The structure of amphimelibioside C (3), which is a major component of amphimelibiosides, was determined by 2D NMR techniques, chemical degradation, and a semisynthetic method to be 1-O-[beta-D-glucopyranosyl-(1-->6)-alpha-D-galactopyranosyl]-(2S,3S,4R,6E)-2-[(2'R)-2-hydroxydocosanoyl]-2-amino-6-octadecene-1,3,4-triol. The structures of the other constituents were elucidated by a combination of mass spectra, (1)H NMR, and GC-MS analysis.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Kyushu University, Maidashi 3-1-1, Higashi-ku, Fukuoka 812-8582, Japan.
authors.forename: Chisato
authors.initials: C
authors.lastname: Emura
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Higuchi
authors.forename: Tomofumi
authors.initials: T
authors.lastname: Miyamoto
authors.forename: Rob W M
authors.initials: RW
authors.lastname: Van Soest
mesh_terms: D000818:Animals; D002554:Cerebrosides / Q000737:chemistry / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D007564:Japan; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D011161:Porifera / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D002554:Cerebrosides