Propallylonal (trade names Nostal, Quietal, Ibomal) is a barbiturate derivative invented in the 1920s. It has sedative, hypnotic and anticonvulsant properties, and is still rarely prescribed as a sleeping medication in some Eastern-European countries.
^Holck HG, Riedesel CC, Robidoux FA. Studies on tolerance and cross-tolerance to Nostal (propallylonal; isopropyl-beta-bromallyl barbituric acid. Journal of the American Pharmaceutical Association. 1950 Nov;39(11):630-7.