Abstract
The structures of three new saponins from the starfish Asteriasforbesi have been elucidated by spectroscopic means. Forbeside F is the hydrate of the monosodium salt of 6α-O-{β-D-fucopyranosyl(1 → 4)-O-[β-D-quinovopyranosyl(1 → 2)]-O-β-D-quinovopyranosyl(1 → 3)-O-6-deoxy-β-D-xylo-hexos-4-ulopyranosyl}-20S-hydroxy-3β-sulfo-oxy-5α-cholest-9(11)-en-23-one. Forbeside G is the hydrate of the monosodium salt of 6α-O-{[β-D-quinovopyranosyl(1 → 2)]-O-β-D-quinovopyranosyl(1 → 3)-O-6-deoxy-β-D-xylo-hexos-4-ulopyranosyl}-20S-hydroxy-3β-sulfo-oxy-5α-cholest-9(11)-en-23-one. Forbeside H is the monosodium salt of 6α-O-{[β-D-quinovopyranosyl(1 → 2)]-β-D-xylopyranosyl(1 → 3)-B-D-quinovopyranosyl}-20S-hydroxy-3β-sulfo-oxy-5α-cholest-9(11)-en-23-one. Keywords: Asteriasforbesi; forbesides F, G, and H; starfish saponins; sterol glycosides.
Published Version
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