Evasteriosides A and B and other sulfated steroids from the Pacific starfish <Emphasis Type="Italic">Evasterias retifera</Emphasis> |
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| Authors: | E V Levina A I Kalinovskii P V Andriyashchenko P S Dmitrenok |
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| Institution: | 1.Pacific Institute of Bioorganic Chemistry,Far-Eastern Branch of the Russian Academy of Sciences,Vladivostok,Russian Federation |
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| Abstract: | Two new polar steroidal glycosides identified as sodium (20R,22E,24R,25S)-3-O-(β-d-xylopyranosyl)-24-methyl-5α-cholest-22-ene-3β,6β,8,15α,26-pentol 26-sulfate (evasterioside A) and sodium (20R,22E)-24-O-(β-d-xylopyranosyl)-5α-cholest-22-ene-3β,6β,8,15α,24-pentol 3-sulfate (evasterioside B) were isolated from the Pacific starfish
Evasterias retifera collected in the Sea of Japan. Five known compounds, viz., coscinasterioside B, aphelasterioside A, marthasterone 3-sulfate and (20R)-cholest-7-en-3β-ol and cholesterol sulfates, were identified. The structures of the new natural compounds were established
using their 2D NMR and mass spectra and some chemical transformations. |
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