摘要
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 C-13-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.
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。
基金
国家自然科学基金(C30000213)
云南省科委和中国科学院西部之光项目。~~
