The ergostanoid lactones, perulactone 3-O-#x3B2;-D-glucopyranoside (1) and isoperulactone 3-O-#x3B2;-D-glucopyranoside (2) were isolated from leaves ofPhysalis peruviana. Compound1reduces the growth ofHelicoverpa zealarvae to 50 of control size at a dietary concentration of 150 mg kg#x2212;1
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