Vinylbital, also known as butylvinal, is a sedative hypnotic drug which is a

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

derivative. It was developed by Aktieboleget Pharmacia in the 1950s.

References

Barbiturates Sedatives GABAA receptor positive allosteric modulators Vinyl compounds {{sedative-stub