Marine Sterols. XVII. : Polyhydroxysterols of the Soft Corals of the Andaman and Nicobar Coasts. : (2). Isolation and Structures of Three 16β-Hydroxy Steroidal Glycosides from an Alcyonium sp. Soft Coral

Masaru KOBAYASHI; Fuyuko KANDA; Srinivasa Rao DAMARLA; Desaraju Venkata RAO; Chaganti Bheemasankara RAO

doi:10.1248/cpb.38.2400

Masaru KOBAYASHI, Fuyuko KANDA, Srinivasa Rao DAMARLA, Desaraju Venkata RAO, Chaganti Bheemasankara RAO

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Keywords: Coelenterata, soft coral, Alcyonium sp., polyhydroxysterol α-L-monofucoside, 24-methylenecholest-5-ene-3β, 16β-diol, 24-methylenecholest-5-ene-3β, 7β, 16β-triol, 24-methylenecholest-5-ene-3β, 7α, 16β-triol

JOURNAL FREE ACCESS

1990 Volume 38 Issue 9 Pages 2400-2403

DOI https://doi.org/10.1248/cpb.38.2400

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Abstract

3β, 7β-Dihydroxy-24-methylenecholesterol (1) and three new polyhydroxysterol glycosides (2a, 3a and 4) were isolated from the lipid extract of an Alcyonium sp. soft coral which was collected in the Andaman and Nicobar Islands. Isolation of steroidal glycosides from soft corals is rare, if not unprecedented. Spectroscopic and chemical degradation studies indicated the new glycosides to be 24-methylenecholest-5-ene-3β, 16β-diol-3-O-α-L-fucoside (2a) and its 7β- (3a) and 7α-hydroxy (4) derivatives.

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