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化学学报
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化学学报 ›› 1992, Vol. 50 ›› Issue (12): 1187-1191. 上一篇    下一篇

研究论文

一个新骨架C~19二萜内酯的晶体结构

陈宏明;贾忠建;巨勇;王奇光   

  1. 兰州大学有机化学研究所;兰州大学分析测试中心
  • 发布日期:1992-12-15

Crystal structure of a C~19 diterpene with carbon skeleton

CHEN HONGMING;JIA ZHONGJIAN;JU YONG;WANG QIGUANG   

  • Published:1992-12-15

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本文报道箭叶橐吾内酯(Sagittolactone),分子式:C~19H~24O~5,M~r=332.4.单斜晶系,空间群P2~1,a=0.7420(1),b=0.8205(2),c=1.3887(1)nm,β=75.71(1)°,Ⅴ=0.819nm^3,z=2,D~c=1.347g.cm^-1;,F(000)=356,T=298K.强度数据由CAD~4四圆衍射仪收集,使用MoKa辐射.结构由直接法解出 ,经块矩阵与全矩阵最小二乘法修正,最终偏离因子R=0.052,R~w=0.068(单位权方式).结构分析表明,此分子是由五个环构成的换碳二萜内酯,分子中间具有笼状结构.

关键词: 生物碱, Ｘ射线衍射分析, 最小二乘法, 消炎药(中药), 抗菌性, 箭叶橐吾内酯, 二萜内酯

The crystal of sagittolactone (I), isolated from the roots of Ligularia sagitta, was determine The result showed that sagittolactone was consisted of five rings and there were two bridged rings in the mol.

Key words: ALKALOID, X-RAY DIFFRACTION ANALYSIS, LEAST SQUARE METHODS, CHINESE ANTI-INFLAMMATION DRUGS, ANTIBIOTIC PROPERTY, ITERPENOID LACTONE

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