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...
Published in: | Canadian Journal of Chemistry |
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Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2005
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Subjects: | |
Online Access: | http://dx.doi.org/10.1139/v05-243 http://www.nrcresearchpress.com/doi/pdf/10.1139/v05-243 |
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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