Flupropadine

Flupropadine is a rodenticide. It was sold under the trade name Rhone Poulenc. Originally made by May and Baker and tested on farms in the United Kingdom it was withdrawn from use by 1994. Flupropadine has a delayed action, and so rodents can have multiple feeds from the bait before being killed.
The molecule has two rings, one is a "m"-hexafluoroxylene, and the other is piperidine.
Flupropadine is made from 3,5-bis(trifluoromethyl)iodobenzene, propargyl alcohol, and 4-"tert"-butylpiperidine.