Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padjadjaran University, Jatinangor 45363, Indonesia.
Molecules. 2011 Mar 29;16(4):2785-95. doi: 10.3390/molecules16042785.
Two tetranortriterpenoids, kokosanolide A (1) and C (2) were isolated from the seeds and three onoceranoid-type triterpenoids: kokosanolide B (3), 8,14-secogammacera-7,14-diene-3,21-dione (4) and a 1.5:0.5 mixture of 8,14-secogammacera-7,14(27)-diene-3,21-dione (5) and compound 4 were isolated from the bark of kokossan (Lansium domesticum). Complete 1H- and 13C-NMR data of the triterpenoids 1-5 are reported. The triterpenoids' structures were elucidated primarily by means of high field 1D- and 2D-NMR, IR and HRMS spectral data. Triterpenoids 1-5 exhibited moderate to strong antifeedant activity against the fourth instar larvae of Epilachna vigintioctopunctata.
可可醇 A（1）和 C（2），从树皮中分离得到了三种奥诺西烷型三萜类化合物：可可醇 B（3）、8,14-二氢-γ-香树脂烷-7,14-二酮（4）以及 8,14-二氢-γ-香树脂烷-7,14(27)-二酮（5）与化合物 4 的 1.5:0.5 混合物。报道了这些三萜类化合物 1-5 的完整 1H 和 13C-NMR 数据。主要通过高场 1D 和 2D-NMR、IR 和 HRMS 光谱数据来阐明三萜类化合物的结构。三萜类化合物 1-5 对二十八星瓢虫的第四龄幼虫表现出中度至强的拒食活性。
