Tetrapterosides A and B,two new oleanane‐type saponins from Tetrapleura tetraptera |
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| Authors: | Olivier Placide Noté Anne‐Claire Mitaine‐Offer Tomofumi Miyamoto Thomas Paululat Dieudonné Emmanuel Pegnyemb Marie‐Aleth Lacaille‐Dubois |
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| Institution: | 1. Laboratoire de Pharmacognosie, UMIB, UPRES EA 3660, Faculté de Pharmacie, Université de Bourgogne, 7 bd. Jeanne D' Arc, BP 87900, 21079 Dijon cedex, France;2. Département de Chimie Organique, Faculté des Sciences, Université de Yaoundé, BP 812 Yaoundé, Cameroun;3. Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812‐8582, Japan;4. Universit?t Siegen FB8, OC‐ II (AK Ihmels) Adolf‐Reichwein‐Str. 2 D‐ 57068 Siegen, Germany |
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| Abstract: | From the stem bark of Tetrapleura tetraptera, two new oleanane‐type saponins, tetrapteroside A 3‐O‐{6‐O‐(2E,6S)‐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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| Keywords: | NMR 1H 13C 2D NMR triterpene saponins tetrapteroside A tetrapteroside B Mimosaceae Tetrapleura tetraptera |
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