【摘要】 本文报道从苦玄参（Picria fel-tarrae Lour）提取物B中分得两个新化合物,苦玄参苷元（picfeltarraegenin）Ⅱ和Ⅲ。根据此两化合物的UV,IR,¹H NMR,¹³C NMR和MS数据以及化学反应,证明分别具有2和8的结构。更多还原

【Abstract】 The structure of the major component isolated from fraction B of the Picria fel-tarrae Lour extract has already been determined as 1. The present paper reports the structure of the other two new aglycones, picfeltarraegenin Ⅱ （2） and picfeltarraegenin Ⅲ （8）. In comparison of the spectroscopic data (UV, IR, ¹HNMR, ¹³C NMR and MS) of picfeltarraegenins Ⅱ and Ⅲ with those of 1 followed by chemical reactions, their structures are assigned as 2 and 8 respectively.更多还原