Isolation and structure of glucosylceramides from the starfish Cosmasterias lurida.
From the water-insoluble lipid fraction of the methylene chloride/methanol extract of the starfish Cosmasterias lurida, two new glucosylceramides together with a known glucosylceramide, ophidiacerebroside E, were isolated by chromatographic procedures and characterized by spectroscopic (1H and 13C nuclear magnetic resonance, mass spectrometry) methods. The new compounds were identified as (2S,3R,4E,8E,10E)-1-(beta-D-glucopyranosyloxy)-3 -hydroxy-2-[(R)-2-hydroxyheptadecanoyl)amino]-9-methyl-4,8,10-o ctadecatriene (3) and (2S,3R,4E,8E,10E)-1-(beta-D-glucopyranosyloxy)-3 -hydroxy-2-[(R)-2-hydroxyoctadecanoyl)amino]-9-methyl-4,8,10-oc tadecatriene (4).
Maier
M S
MS
Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Argentina. maier@qo.fcen.uba.ar
Kuriss
A
A
Seldes
A M
AM
D000818:Animals; D002240:Carbohydrate Sequence; D002851:Chromatography, High Pressure Liquid; D005963:Glucosylceramides / Q000737:chemistry* / Q000302:isolation & purification*; D008969:Molecular Sequence Data; D019906:Nuclear Magnetic Resonance, Biomolecular; D013215:Starfish / Q000737:chemistry*
D005963:Glucosylceramides