ISOLATION AND STRUCTURE DETERMINATION OF XANTHONE GLYCOSIDES OF ANEMARRHENA ASPHODELOIDES

Xilingzhimu, the rhizomes of Anemarrhena asphodeloides Bunge (Liliaceae), has been prescribed as antipyretic, anti-inflammatory, diuretic and hypoglycemic agents in Chinese traditional medicine. In this paper, two xanthone glycosides I and II, were isolated from Xilingzhimu by conventional method. The structures of I and II were identified on the basis of chemical reactions and UV, IR, ¹HNMR,¹³CNMR and DEPT. Compound I was identified as mangiferin and II is a new compound, named neomangiferin. Its structure is 7-O-β-D-glucopyranosylmangiferin.