降五环三萜──蓑衣莲酮的研究

A New Norpentacyclic Triterpenoid Auriculatone from Aster auriculatus Franch

从云南省玉溪地区产蓑衣莲的根部得到一种降五环三萜，经光谱分析及其衍生物的Ｘ射线衍射分析确定为新化合物蓑衣莲酮。

A new norpentacyclic triterpenoid, auriculatone, was isolated from Aster auriculatus Franch. On the basis of physico-chemical constants, spectral data and X-ray diffraction analysis of 3β-acetoxy derivative (Ⅱ), its structure was determined as 3β-hydroxy-17α-H,18β-H-28-norolean-12-ene-16-one (Ⅰ).