Constituents of Withania Somnifera Dun. Part X The Structure of Withanolide D
作者： D. Lavie , I. Kirson , E. Glotter
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摘要: Withanolide D, the major component of leaves Withania somnifera chemotype II, is a steroidal lactone withanolide type, isomeric with withaferin A. It has been identified as 5, 6β-epoxy-4β, 20α-dihydroxy-1-oxo-(5β)witha-2, 24-dienolide. The structure elucidated by NMR measurements and chemical degradation to 4β-acetoxy-5,6β-epoxy (5β) pregnan-1, 20-dione.
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