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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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2381–2386, November, 2008.
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Levina, E.V., Kalinovskii, A.I., Andriyashchenko, P.V. et al. Evasteriosides A and B and other sulfated steroids from the Pacific starfish Evasterias retifera . Russ Chem Bull 57, 2431–2436 (2008). https://doi.org/10.1007/s11172-008-0347-6
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DOI: https://doi.org/10.1007/s11172-008-0347-6