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

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

A steroidal saponin, 3-O-α-L-rhamnopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→3)]-β-D-glucopyranosylpennogenin (1, spiroconazole A) was isolated from the tubers of Dioscorea bulbifera L. var sativa and ¹H-and ∨13C-NMR assignment was completed using HMBC correlation. In addition, four phenolic substance...

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Veröffentlicht in:Natural product sciences 2006-03, Vol.12 (1), p.62-66
Hauptverfasser: Teponno, R.B. (Department of Chemistry, Faculty of Science, University of Dschang, Dachang, Cameroon), Tapondjou, A.L. (Department of Chemistry, Faculty of Science, University of Dschang, Dachang, Cameroon), Djoukeng, J.D. (Department of Chemistry, Faculty of Science, University of Dschang, Dachang, Cameroon), Mansour, E.A. (Institute of Chemistry, University of Neuchatel, Av. Bellevaux, CH, Neuchatel, Switzerland), Tabacci, Raphael (Institute of Chemistry, University of Neuchatel, Av. Bellevaux, CH, Neuchatel, Switzerland), Tane, Pierre (Department of Chemistry, Faculty of Science, University of Dschang, Dachang, Cameroon), Lontsi, David (Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Cameroon), Park, H.J. (Sangji University, Wonju, Republic of Korea), E-mail: hjpark@sangji.ac.kr
Format: Artikel
Sprache:eng
Schlagworte:
Dioscorea bulbifera L. var sativa
FLAVONOIDE
FLAVONOIDES
FLAVONOIDS
HMBC
phenanthrene
steroidal saponin
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Zusammenfassung:A steroidal saponin, 3-O-α-L-rhamnopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→3)]-β-D-glucopyranosylpennogenin (1, spiroconazole A) was isolated from the tubers of Dioscorea bulbifera L. var sativa and ¹H-and ∨13C-NMR assignment was completed using HMBC correlation. In addition, four phenolic substances, 2, 7-dihydroxy-4-methoxyphenanthrene (2), quercetin (3), quercetin-3-O-β-D-glucopyranoside (4), and quercetin-3-O-β-D-galactopyranoside (5) were also isolated.
ISSN:1226-3907
2288-9027