<unk> , also called butobarbitone or butethal, Soneryl, and Neonal, is a hypnotic drug which is a barbiturate derivative. It was developed by Poulenc Brothers (now part of Rhône Poulenc) in 1921.
Butobarbital
Amobarbital
Pentobarbital
Heptobarbital
Ethallobarbital
Secobarbital
Hexobarbital
Phenobarbital