Butobarbital, also called butobarbitone or butethal, Soneryl, and Neonal, is a hypnotic drug which is a

barbiturate Barbiturates are a class of depressant, depressant drugs that are chemically derived from barbituric acid. They are effective when used medication, medically as anxiolytics, hypnotics, and anticonvulsants, but have physical and psychological a ...

derivative. It was developed by Poulenc Brothers (now part of Sanofi) in 1921.

References

Barbiturates Butyl compounds {{sedative-stub