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Tetrapterosides A and B, two new oleanane-type saponins from Tetrapleura tetraptera

✍ Scribed by Olivier Placide Noté; Anne-Claire Mitaine-Offer; Tomofumi Miyamoto; Thomas Paululat; Dieudonné Emmanuel Pegnyemb; Marie-Aleth Lacaille-Dubois

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
128 KB
Volume
47
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

From the stem bark of Tetrapleura tetraptera, two new oleanane‐type saponins, tetrapteroside A 3‐O‐{6‐O‐[(2__E__,6__S__)‐2,6‐dimethyl‐6‐hydroxyocta‐2,7‐dienoyl]‐β‐D‐glucopyranosyl‐(1 → 2)‐β‐D‐glucopyranosyl‐(1 → 3)‐β‐D‐glucopyranosyl‐(1 → 4)‐[β‐D‐glucopyranosyl‐(1 → 2)]‐β‐D‐glucopyranosyl}‐3,27‐dihydroxyoleanolic acid (1), and tetrapteroside B 3‐O‐{ β‐D‐glucopyranosyl‐(1 → 2)‐6‐O‐[(E)‐feruloyl]‐β‐D‐glucopyranosyl‐(1 → 3)‐β‐D‐glucopyranosyl‐(1 → 4)‐[β‐D‐glucopyranosyl‐(1 → 2)]‐β‐D‐glucopyranosyl}‐3,27‐dihydroxyoleanolic acid (2), were isolated. Further extractions from the roots led to the isolation of four known oleanane‐type saponins. Their structures were elucidated by the combination of mass spectrometry (MS), one and two‐dimensional NMR experiments. Copyright © 2009 John Wiley & Sons, Ltd.

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