Glycosides from the sea cucumber Cucumaria frondosa. IV. Structure of frondosides A 2 -4, A 2 -7, and A 2 -8, three new minor monosulfated triterpene glycosides

Frondosides A 2 -4 (1), A 2 -7 (2), and A 2 -8 (3) are new monosulfated triterpene glycosides isolated from the sea cucumber Cucumaria frondosa. Their structures have been elucidated on the basis of spectral data (2D NMR and MS). Frondosides A 2 -7 (2) and A 2 -8 (3) are isomers and differ from each...

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Bibliographic Details
Published in:Canadian Journal of Chemistry
Main Authors: Silchenko, Alexandra S, Avilov, Sergey A, Antonov, Alexandr S, Kalinovsky, Anatoly I, Dmitrenok, Pavel S, Kalinin, Vladimir I, Woodward, Carl, Collin, Peter D
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 2005
Subjects:
Cucumaria frondosa
Online Access:http://dx.doi.org/10.1139/v05-243
http://www.nrcresearchpress.com/doi/pdf/10.1139/v05-243
Description
Summary:Frondosides A 2 -4 (1), A 2 -7 (2), and A 2 -8 (3) are new monosulfated triterpene glycosides isolated from the sea cucumber Cucumaria frondosa. Their structures have been elucidated on the basis of spectral data (2D NMR and MS). Frondosides A 2 -7 (2) and A 2 -8 (3) are isomers and differ from each other only by the position of a double bond in their non-holostane-type aglycones.Key words: Cucumaria frondosa, sea cucumbers, frondosides, triterpene glycosides.

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