Several benzphenanthridine type alkaloids have been isolated by following insect antifeedant assays for fractionation.There is a possibility that the wellknown chelerythrine could be an artefact, at least in the present case.In continuation with our studies on insect antifeedantslr2 and medicinally active compounds contained in plants, we have investi-3 gated the root barks of Fagara chalybea , F. holstii(Rutaceae) and Xylocarpus granatum(Me1iaceae) 16'4, all of which taste bitter and 5
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Nakanishi et al. (1977) studied this question.