title: Two new insecticidal sesquiterpene esters from Euonymus japonicus.
abstract: Two new insecticidal sesquiterpene esters with a beta-dihydroagarofuran sesquiterpene skeleton, ejaponine A (1) and ejaponine B (2), and two known compounds, 3 and 4, were isolated from the EtOAc extract of the root bark of Euonymus japonicus Thunb. by bioassay-guided fractionation. Their chemical structures were elucidated mainly by analysis of MS and NMR spectral data. The LD50 values of ejaponine A (1), ejaponine B (2), 3 and 4 showed against Mythimna separata were 89.2, 98.6, 181.4 and 109.2 microg g(-1), respectively.
authors.affiliation: Department of Plant Protection, Northwestern Agricultural University, Yangling, Shaanxi 712100, People's Republic of China.
authors.forename: Qidong
authors.initials: Q
authors.lastname: Zhang
authors.forename: Zhiqing
authors.initials: Z
authors.lastname: Ji
authors.forename: Mingan
authors.initials: M
authors.lastname: Wang
authors.forename: Wenjun
authors.initials: W
authors.lastname: Wu
mesh_terms: D000818:Animals; D029756:Euonymus / Q000737:chemistry*; D007306:Insecticides / Q000737:chemistry* / Q000494:pharmacology*; D007814:Larva / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D009036:Moths / Q000187:drug effects; D012717:Sesquiterpenes / Q000737:chemistry* / Q000494:pharmacology*
chemical_list: D007306:Insecticides; D012717:Sesquiterpenes