Unprecedented Quassinoids from Eurycoma longifolia: Biogenetic Evidence and Antifeedant Effects
文献类型： 外文期刊
作者： Yang, Wei-Qun 1 ; Shao, Xue-Hua 3 ; Deng, Fang 1 ; Hu, Li-Jun 1 ; Xiong, Yu 1 ; Huang, Xiao-Jun 1 ; Fan, Chun-Lin 1 ; Jia 1 ;
作者机构： 1.Jinan Univ, Inst Tradit Chinese Med & Nat Prod, Coll Pharm, Guangzhou 510632, Guangdong, Peoples R China
2.Jinan Univ, Guangdong Prov Key Lab Pharmacodynam Constituents, Guangzhou 510632, Guangdong, Peoples R China
3.Guangdong Acad Agr Sci, Key Lab South Subtrop Fruit Biol & Genet Resource, Guangdong Prov Key Lab Trop & Subtrop Fruit Tree, Inst Fruit Tree Res, Guangzhou 510640, Guangdong, Peoples R China
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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