Teflurane

Teflurane (INN, USAN, code name Abbott 16900) is a halocarbon drug which was investigated as an inhalational anesthetic but was never marketed. Its clinical development was terminated due to a high incidence of cardiac arrhythmias in patients, similarly to the cases of halopropane and norflurane.
Chemistry.
Teflurane is 2-bromo-1,1,1,2-tetrafluoroethane, a haloalkane. It is a gas at standard conditions. The compound is chiral.