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In an attempt to find the biorational pesticides, a series of novel camptothecin derivatives were synthesized via a simple modification of the carbodiimide method using the combination of scandium triflate (Sc(OTf) 3 ) and 4-dimethylaminopyridine (DMAP), and their structures were identified by IR, ESR, HRMS and 1 H NMR. Their antifeedant effect and insecticidal activity against third-instar...
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