Unprecedented Quassinoids from Eurycoma longifolia: Biogenetic Evidence and Antifeedant Effects

文献类型： 外文期刊

第一作者： Yang, Wei-Qun

作者： Yang, Wei-Qun;Deng, Fang;Hu, Li-Jun;Xiong, Yu;Huang, Xiao-Jun;Fan, Chun-Lin;Jiang, Ren-Wang;Ye, Wen-Cai;Wang, Ying;Yang, Wei-Qun;Deng, Fang;Hu, Li-Jun;Xiong, Yu;Huang, Xiao-Jun;Fan, Chun-Lin;Jiang, Ren-Wang;Ye, Wen-Cai;Wang, Ying;Shao, Xue-Hua

作者机构：

期刊名称：JOURNAL OF NATURAL PRODUCTS （ 影响因子：4.05； 五年影响因子：4.603 ）

ISSN： 0163-3864

年卷期： 2020 年 83 卷 5 期

页码：

收录情况： SCI

摘要： Six new quassinoids (1-6) were isolated from the roots of Eurycoma longifolia, and their structures with absolute configurations were determined unambiguously by spectroscopic analyses and single-crystal X-ray crystallographic experiments. Compounds 1 and 2 are the first members of a new class of quassinoids with an unusual C-26 carbon skeleton. Compound 6 features a C-20 cage-like scaffold with an unprecedented densely functionalized 2,5-dioxatricyclo[5.2.2.0(4,8)]undecane core. The discovery of the two C-26 quassinoids 1 and 2 has provided firm evidence for the better understanding the biogenetic process from C-30 triterpenoid precursors to quassinoids. Compound 5 exhibited significant antifeedant activity on the diamondback moth (DBM) larvae and excellent systemic absorption and accumulated properties in Brassica chinensis.

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