目的　对芜菁还阳参 (Crepisnapifera (Franch)Babc.)根的化学成分进行研究。 方法　采用溶剂分配及各种色谱方法进行分离纯化。得到 2个化合物 ,用1HNMR ,13 CNMR ,DEPT ,1H 1HCOSY ,HMQC ,HMBC ,ROESY ,MS和UV光谱技术进行鉴定。结果　得到 2个萜类化合物 ,分别是Δ4 ,9 二烯 重排桉烷 13,15 二羧酸 15 β D 葡糖苷 ,命名为还阳参酸苷 (napiferoside ,I)和蒲公英醋酸酯 (acetatetaraxasterol,II)。结论　化合物I为一新的重排桉烷型倍半萜苷类化合物 Objective To study the chemical constituents of the root of the genus Crepisnapifera (Franch) Babc. Methods Solvent separation and various chromatographic methods were used for separation and purification. Two compounds were obtained and identified by 1HNMR, 13CNMR, DEPT, 1H 1HCOSY, HMQC, HMBC, ROESY, MS and UV spectroscopy techniques. As a result, two terpenoids, namely Δ4, 9 diene-recycled decane 13,15 dicarboxylic acid 15 β D glucoside, were obtained, which were named as napiferoside (I) and acetate taraxacum, respectively. II). Conclusion Compound I is a novel rearrangement steroidal sesquiterpene glycoside compound