Affiliation:
1. Lishui Techonology College, Lishui 323000, P. R. China
2. Zhejiang Chinese Medical University, Hangzhou 310053, P. R. China
Abstract
Two new C21 steroids, 12β- O-acetyl-20- O-(2-methylbutyryl)-sarcostin and its 3- O-digitoxopyranoside (1-2) were isolated from the roots of Cynanchum otophyllum, together with three known steroids, namely deacetylmetaplexigenin (3), sarcostin (4), and kidjoranin 3 -O-β-D-digitoxopyranoside (5). The structures of the new steroids were established by spectroscopic and chemical methods, especially two-dimensional NMR techniques.
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6 articles.
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