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Inhibition of mosquito (Aedes aegypti) larval development by 12-epi-hapalindole H isonitrile. Shown are 2nd instar larvae treated with the alkaloid (a) showing development abnormalities compared to untreated control larvae (b). Most larvae treated with 12-epi-hapalindole H, however, do not transition from 1st to 2nd instar.
