1952-67-6 2,4,6(1H,3H,5H)-Pyrimidinetrione, 5-(2-butenyl)-5-ethyl- 5-(2-Butenyl)-5-ethylbarbituric acid 5-Ethyl-5-crotylbarbituric acid Barbituric acid, 5-(2-butenyl)-5-ethyl- Barotal Barotalum Calypnone Crotarbital Crotylbarbital Crotylbarbitalum Ethyl(crotyl)barbiturate Ethyl-crotyl-barbiturate Go 1046 Kalipnon Kalypnetten Kalypnon Mepertan NSC125735