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Tetrapterosides A and B, two new oleanane‐type saponins from Tetrapleura tetraptera
Author(s) -
Noté Olivier Placide,
MitaineOffer AnneClaire,
Miyamoto Tomofumi,
Paululat Thomas,
Pegnyemb Dieudonné Emmanuel,
LacailleDubois MarieAleth
Publication year - 2009
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.2381
Subject(s) - chemistry , oleanane , stereochemistry , traditional medicine , triterpene , medicine , alternative medicine , pathology
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.