Studies on the constituents of Zizyphi Fructus. III. Structures of dammarane-type saponins.
作者:NOBUYUKI OKAMURA、TOSHIHIRO NOHARA、AKIRA YAGI、ITSUO NISHIOKA
DOI:10.1248/cpb.29.676
日期:——
Zizyphus saponins I, II, III and jujuboside B were isolated from Zizyphi Fructus. On Smith-de Mayo degradation, zizyphus saponins I, II and III yielded jujubogenin as a genuine aglycone. The configuration of the sugar linkages in each saponin was determined on the basis of PMR and CMR examinations and application of Klyne's rule on molecular rotation, and the structures of zizyphus saponins I, II and III were established as (I), (II) and (III), respectively. 6-Deoxy-L-talose was isolated as a sugar component of zizyphus saponins I and III.
酸枣仁皂苷I、II、III和枣仁皂苷B自酸枣仁中分离而得。酸枣仁皂苷I、II、III经Smith-de Mayo降解反应得到真正的皂苷元——酸枣仁苷元。通过PMR、CMR检测及应用Klyne分子旋光法测定了各皂苷中糖连接的构型,从而确定了酸枣仁皂苷I、II、III的结构分别为(I)、(II)和(III)。6-脱氧-L-太妃糖作为酸枣仁皂苷I和III的糖部分被分离出来。