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Isolation and NMR Assignment of a Pennogenin Glycoside from Dioscorea bulbifera L. var sativa  

Teponno, Remy Bertrand (Department of Chemistry, Faculty of Science, University of Dschang)
Tapondjou, Azefack Leon (Department of Chemistry, Faculty of Science, University of Dschang)
Djoukeng, Jules Desire (Department of Chemistry, Faculty of Science, University of Dschang,Institute of Chemistry, University of Neuchatel)
Abou-Mansour, Eliane (Institute of Chemistry, University of Neuchatel)
Tabacci, Raphael (Institute of Chemistry, University of Neuchatel)
Tane, Pierre (Department of Chemistry, Faculty of Science, University of Dschang)
Lontsi, David (Department of Organic Chemistry, Faculty of Science, University of Yaounde)
Park, Hee-Juhn (Department of Botanical Resources, Sangji University)
Publication Information
Natural Product Sciences / v.12, no.1, 2006 , pp. 62-66 More about this Journal
Abstract
A steroidal saponin, $3-O-{\alpha}-L-rhamnopyranosyl-(1{\rightarrow}2)-[{\alpha}-L-rhamnopyranosyl-(1{\rightarrow}3)]-{\beta}-D-glucopyranosylpennogenin$ ;(1, spiroconazole A) was isolated from the tubers of Dioscorea bulbifera L. var sativa and $^1H-and\;^{13}C-NMR$ assignment was completed using HMBC correlation. In addition, four phenolic substances, 2,7-dihydroxy-4-methoxyphenanthrene (2), quercetin (3), $quercetin-3-O-{\beta}-D-glucopyranoside$ (4), and $quercetin-3-O-{\beta}-D-galactopyranoside$ (5) were also isolated.
Keywords
Dioscorea bulbifera L. var sativa; steroidal saponin; phenanthrene; flavonoid; HMBC;
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Times Cited By SCOPUS : 9
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