What is "buthalital"

n. A barbiturate derivative which was under development as a short-acting anesthetic.

Buthalital sodium ( INN; Bayinal, Baytinal, Thialbutal, Transithal, Ulbreval), or buthalitone sodium ( BAN), is a barbiturate derivative which was under development as a short-acting anesthetic. However, development was discontinued, perhaps due to its extremely rapid elimination rate, and buthalital sodium was never marketed.