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Biologically active glycosides from asteroidea, XIX. Glycosphingolipids from the starfishAcanthaster planci 4. Isolation and structure of five new gangliosides

✍ Scribed by Kawano, Yasuhiro ;Higuchi, Ryuichi ;Komori, Tetsuya

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
817 KB
Volume
1990
Category
Article
ISSN
0947-3440

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✦ Synopsis

Abstract

Five new gangliosides β€” acanthaganglioside A (1), B (2), C (3), D (4) and E (5) β€” were purified from the water‐soluble lipid fraction of the chloroform/methanol extract of the starfish Acanthaster planci. Based on chemical and spectroscopic data, the structures of 1–5 were elucidated. The gangliosides consist of one homogeneous long‐chain base, five or six sugars and different fatty acids. Reversed‐phase HPLC using methanol/ammonia/water as solvent was effective in isolating these gangliosides, showing the very close similarity in their structures. Negative FAB mass spectrometry provided important information both on the structure of the sugar moiety and on the molecular mass of the gangliosides. Partial hydrolysis by hot pyridine/water or hot water was useful for structure elucidation of the complex oligosaccharide moieties.

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