ヒメドコロDioscorea tenuipes FRANCH.et SAVAT.地上部の成分研究(第1報)成分の単離およびDiotigenin 2-AcetateとDiotigenin 2,4-Diacetateの構造
1975 年 95 巻 1 号 p. 94-101
詳細
1975 年 95 巻 1 号 p. 94-101
The constituents of the fresh aerial parts of Dioscorea tenuipes FRANCH. et SAVAT. (Dioscoreaceae) collected at the Ozeki pass, Shiga, in September and October, were extracted and separated with special care not to cause secondary alteration. Seven new substances, tentatively designated G1, G2, G3, G4, S1, S4, and SE1, were isolated together with five known compounds ; phytosterols, taraxerol, neotokorogenin, diotigenin, and tenuipegenin. G2, mp 214-215°, [α]D -48.6°, and G3, mp 211-212°, [α]D -41.2°, were characterized as diotigenin 2-acetate (I) and its 2, 4-diacetate (X), respectively, which represent the first spirostanol (steroidal sapogenin) acetates found in nature.
