CRYSTAL STRUCTURE OF CHUANLIANSU C30H38O11·3H20

摘要

＜正＞ Introduction. Chuanliansu（1）, C30H38O11·3H2O, isolated from the bark of Melia toosendan S. et Z., is an active anthelimintic against ascaris （Chung, 1975; Shu, 1980）. In the course-of our systematic investigation on the relationship between the structure and biological activity of its analogues （Ochi, 1976; Arnoux, 1980）, we have undertaken an X-ray structural, determination of the title compound. The’molecule belongs to the triterpene group with a furan ring and a hemiacetai bridge between C（19） and C（28）. Its colorless crystals have been obtained by slow evaporation of an alcohol-water solution.