Abstract:

Seven compounds were isolated from the EtOH extraction of the twig of Carapa guianensis Aubl. (Meliaceae). On the basis of spectroscopic methods, their structures were elucidated as (-)-epicatechin-3-O-(3″, 5″-di-O-methyl) gallate (1), (-)-catechin (2), sciadopitysin (3), cleomiscosin B (4), photogedunin (5), chisocheton compound F (6) and odoratone (7), respectively. Among them compound 1 was a new flavane, compounds 2-7 were firstly obtained from this plant, and compound 5 was assigned the 13C-NMR data for the first time.Compound 7 exhibited strong antifeedant activity against Pieris brassicae, and compound 2 exhibited moderate activity, while the n-BuOH portion showed weak activity.

酸渣树中一个新的黄烷类化合物
漆淑华 吴大刚 马云保 罗晓东
(中国科学院昆明植物研究所植物化学与西部植物资源持续利用国家重点实验室，昆明 650204)

摘要: 从酸渣树(Carapa guianensis Aubl.)枝条的乙醇提取物中首次分离到7 个化合物，通过波谱方法鉴定，
它们分别是：(-)-epicatechin-3-O-(3″,5″-di-O-methyl) gallate (1)、(-)-catechin (2)、sciadopitysin (3)、
cleomiscosin B (4)、photogedunin (5)、chisocheton compound F (6)和odoratone (7)。其中，化合物1
为新黄烷类化合物,2～7 为首次从该植物中分离得到。补充了化合物5 的¹³C-NMR 谱数据。活性测定显示，化合物7 对大菜粉蝶(Pieris brassicae)三龄幼虫具有较强的杀虫活性，化合物2 有一定的活性，而正丁醇部分只有很弱的活性。
关键词: 酸渣树；楝科；(-)-epicatechin-3-O-(3″,5″-di-O-methyl) gallate；杀虫活性

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