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- Title
Identification de xanthones et de nouveaux arabinosides de C-glucosides flavoniques dans Swertia perennis L.
- Authors
Hostettmann, Kurt; Jacot-Guillarmod, André
- Abstract
Identification of xanthones and new arabinosides of flavone C-glucosides from Swertia perennis L. - Seven tetraoxygenated xanthones [1,3,7,8-tetrahydroxy-xanthone ( 1); 1,8-dihydroxy-3,7-dimethoxy-xanthone ( 2); 1,7-dihydroxy-3,8-dimethoxy-xanthone ( 3); 1-hydroxy-3,7,8-trimethoxy-xanthone ( 4); 3,7,8-trihydroxy-xanthone-xanthone-1-0-β-glucoside ( 5); 3,7,8-trimethoxy-xanthone-1-0-primeveroside ( 6); 8-hydroxy-3,7-dimethoxy-xanthone-1-0-primeveroside ( 7)] have been isolated chromatographically, using polyamide columns, from roots of Swertia perennis L. From leaves and stems of the same plant, six xanthones [1,5,8-trihydroxy-3-methoxy-xanthone ( 8); 1,5-dihydroxy-3-methoxy-xanthone-8-0-β-glucoside ( 9); mangiferin ( 10); 1; 4; 5] and four flavone C-glycosides [iso-orientin ( 11); isovitexin ( 12); iso-orientin-6″-arabinoside ( 13); isovitexin-6″-arabinoside ( 14)] have also been isolated. Among these compounds, 7, 13 and 14 were not encountered before in nature. In the last two compounds, the position of arabinose on the C-glucoside moiety of the flavone was established by 13C-NMR. spectroscopy.
- Publication
Helvetica Chimica Acta, 1976, Vol 59, Issue 5, p1584
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19760590517