5-ethyl-5-but-2c-enyl-barbituric acid, Calypnone, 5-but-2-enyl-5-ethyl-pyrimidine-2,4,6-trione, Crotylbarbitalum, Barotalum, Crotarbital, Kalipnon, Mepertan, Ethyl(crotyl)barbiturate, 5-Aethyl-5-but-2c-enyl-barbitursaeure, Kalypnetten, Kalypnon, cis-5-Ethyl-5-crotyl-barbitursaeure, Barotal