Xanthone glycosides from Polygala tenuifolia and their conformational analyses.
Copyright policy )Xanthone glycosides from Polygala tenuifolia and their conformational analyses.
Seven xanthone glycosides were isolated from the cortexes of Polygala tenuifolia, and their structures were identified as polygalaxanthones VIII-XI (1-4), sibiricoxanthone B (5), 7-O-methylmangiferin (6), and lancerin (7), on the basis of spectroscopic analyses. Compounds 1-4 are new xanthone glycosides, and compounds 4 and 5 exist as rotamers. To explain this phenomenon, conformational analyses were performed on compounds 4 and 5 and other compounds with similar skeletons that were isolated from P. tenuifolia.
Plants, Medicinal, Molecular Structure, Polygala, Xanthones, Glycosides, Medicine, Chinese Traditional, Nuclear Magnetic Resonance, Biomolecular, Plant Roots
Plants, Medicinal, Molecular Structure, Polygala, Xanthones, Glycosides, Medicine, Chinese Traditional, Nuclear Magnetic Resonance, Biomolecular, Plant Roots
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