【摘要】 <正> 秃毛冬青甲素为一种新木脂类化合物,在氯仿中重结晶得无色透明的六边形晶体,它的分子式为C₁₄H₁₆O₆,分子量280.09,计算密度1.443g/cm³,m.p.195～197℃.化学结构分析表明结构式如下:更多还原

【Abstract】 Glaberide I(C₁₄H₁₆O₆) isolate from Ilex pubescens HOOK et Arn var. glaber Chang is used to cure heart disease. The crystal of glaberide I belongs to monoclinic system, space group P2₁/c. There are four molecules in an unit cell with parameters α=10.619A, b=7.157A, c=17.129A and β=98.7°. The number of three-dimensional intensity data collected by PW-1100 four-circle diffractometer amounts to 2349. The structure was solved by direct method and refined by full matrix least-squares method with final R=0.11.The result showed that the two five-membered rings are cis-fused and the hydrogen atoms connected to carbon atoms 5 and 6 respectively are trans to each other. Hydrogen-bonding is shown to exist between two molecules related with the symmetrical centre in the unit cell.（Fig.3 and 4 of the Chinese Text）.更多还原