The active ingredient in Advantage flea treatment

Imidacloprid (IUPAC name (EZ)-1-(6-chloro-3-pyridylmethyl)-N-nitroimidazolidin-2-ylideneamine) is an insecticide manufactured by Bayer Cropscience (part of the drug and chemical conglomerate Bayer AG). It is sold under the trade names Merit, Admire, Gaucho, Confidor, Premise and Winner, as well as Hachikusan (in Japan) and Premise for termite control, and Advantage in the US and Europe for flea control on pets.