【摘 要】
：
Two new xanthone glycosides,polygalaxanthone IV and V were isolated from the roots of Polygala tenuifolia Willd.Their structures were established as 6-O-[(-L-rh
【机 构】
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Modern Research Center of TCM
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Two new xanthone glycosides,polygalaxanthone IV and V were isolated from the roots of Polygala tenuifolia Willd.Their structures were established as 6-O-[(-L-rhamnopyranosyl- (1?2)-(-D-glucopyranosyl]-1-hydroxy-3,7-dimethoxyxanthone (polygalaxanthone IV),and 6-O- [(-L-rhamnopyranosyl-(1?2)-(-D-glucopyranosyl]-1,3-dihydroxy-7-methoxyxanthone (polyga- laxanthone V),respectively,on the basis of chemical and spectral evidence.
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