Four novel insecticidal sesquiterpene esters from Celastrus angulatus |
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Authors: | Zhiqing Ji Wenjun Wu Hua Yang Baojun Shi Mingan Wang |
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Institution: | Department of Plant Protection, Northwestern Agricultural University, Shaanxi 712100, People's Republic of China. |
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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. |
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