ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
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.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19760590517
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