Aristolochic Acid‐I in the Swallowtail ButterflyPachlioptera Aristolochiae(Fabr.) (Papilionidae)

Abstract
The isolation of aristolochic acid‐I from Pachlioptera aristolochiae (Fabr.) is described. About 0.1 mg is present in each butterfly. The larvae feed exlusively on plants of the family Aristolochiaceae and presumably ingest the acid which is stored and carried through the pupal stage to the adult insect.