Oleanane‐Type Glycosides from Tremastelma palaestinum (L.) Janchen |
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| Authors: | Gökhan ?enel Derya Gülcemal Milena Masullo Sonia Piacente Tamer Karay?ld?r?m |
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| Affiliation: | 1. Chemistry Department, Faculty of Science, Ege University, 35100 Bornova, Izmir, Turkey (phone: +902323882369;2. fax: +902323888264;3. Dipartimento di Farmacia, Università degli Studi di Salerno, Via Giovanni Paolo II n.132, I‐84084 Fisciano (phone: +39089969763;4. fax: +39089969602) |
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| Abstract: | Three new oleanane‐type glycosides, 1 – 3 , were isolated from the whole plant of Tremastelma palaestinum (L.) Janchen, along with eight known triterpene glycosides. The structures of the new compounds were established as 3‐O‐β‐d‐ glucopyranosyl‐(1→3)‐α‐l‐ rhamnopyranosyl‐(1→3)‐β‐d‐ glucopyranosyl‐(1→3)‐α‐l‐ rhamnopyranosyl‐(1→2)‐α‐l‐ arabinopyranosyl]hederagenin ( 1 ), 3‐O‐β‐d‐ glucopyranosyl‐(1→3)‐α‐l‐ rhamnopyranosyl‐(1→3)‐β‐d‐ glucopyranosyl‐(1→3)‐α‐l‐ rhamnopyranosyl‐(1→2)‐α‐l‐ arabinopyranosyl]hederagenin 28‐O‐β‐d‐ glucopyranosyl‐(1→6)‐β‐d‐ glucopyranosyl ester ( 2 ), and 3‐O‐α‐l‐ rhamnopyranosyl‐(1→3)‐β‐d‐ glucopyranosyl‐(1→3)‐α‐l‐ rhamnopyranosyl‐(1→2)‐α‐l‐ arabinopyranosyl]oleanolic acid 28‐O‐β‐d‐ glucopyranosyl‐(1→6)‐β‐d‐ glucopyranosyl ester ( 3 ) by using 1D‐ and 2D‐NMR techniques and mass spectrometry. This is the first report on the phytochemical investigation of a species belonging to Tremastelma genus. |
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| Keywords: | Glycosides Tremastelma palaestinum Oleananes Saponins |
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