title: Four novel insecticidal sesquiterpene esters from Celastrus angulatus.
abstract: Four new insecticidal sesquiterpene polyol esters with a beta-dihydroagarofuran sesquiterpene skeleton, celangulatin C (1), celangulatin D (2), celangulatin E (3), and celangulatin F (4), and five known compounds 5-9 were isolated from the low-polar toluene extracts of the root bark of Celastrus angulatus by bioassay-guided fractionation. Their chemical structures were elucidated mainly by analyses of MS and NMR spectral data. Celangulatin C, E and F showed LD(50) against Mythimna separata were 280.4, 1656.4 and 210.5 microg mL(-1), respectively.
authors.affiliation: Department of Plant Protection, Northwestern Agricultural University, Shaanxi 712100, People's Republic of China.
authors.forename: Ji
authors.initials: J
authors.lastname: Zhiqing
authors.forename: Wu
authors.initials: W
authors.lastname: Wenjun
authors.forename: Yang
authors.initials: Y
authors.lastname: Hua
authors.forename: Shi
authors.initials: S
authors.lastname: Baojun
authors.forename: Wang
authors.initials: W
authors.lastname: Mingan
mesh_terms: D000818:Animals; D031247:Celastrus / Q000737:chemistry*; D002681:China; D004952:Esters / Q000737:chemistry / Q000302:isolation & purification*; D007313:Insecta; D007306:Insecticides / Q000737:chemistry / Q000302:isolation & purification*; D019906:Nuclear Magnetic Resonance, Biomolecular; D009904:Optical Rotation; D010936:Plant Extracts / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D004952:Esters; D007306:Insecticides; D010936:Plant Extracts; D012717:Sesquiterpenes