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DOI: 10.1055/s-2006-957697
© Georg Thieme Verlag Stuttgart · New York
Phytochemical Reinvestigation of Xysmalobium undulatum Roots (Uzara)1
1 Presented in part at the International Symposium “Biology and Chemistry of Active Natural Substances”, July 17-22, 1990, Bonn, Germany, Planta Med. 56 (1990), 550Publication History
1996
1996
Publication Date:
04 January 2007 (online)

Abstract
Four major cardenolide glycosides of Xysmalobium undulatum (L.) R. Br. roots (Uzara) have been isolated for the first time in pure form. The structures were elucidated by spectral analyses and determined as sophorosides and their 17-epimers, respectively. Thus, the structural elucidation of uzarin and xysmalorin, the two main glycosides, has been completed. The corresponding H-17β isomers, allouzarin and alloxysmalorin, were characterized as genuine compounds.
Key words
Xysmalobium undulatum - Asclepiadaceae - cardenolide glycosides - sophorosides - Uzara - uzarin - xysmalorin - allouzarin - alloxysmalorin