中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 12β-O-acetyl-20-O-(2-methylbutyryl)-sarcostin 3-O-β-D-digitoxopyranose | —— | C34H54O11 | 638.796 |
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.