Synonyms: 2,4,6(1H,3H,5H)-Pyrimidinetrione,5-(2-butenyl)-5-ethyl- (9CI); Barbituric acid, 5-(2-butenyl)-5-ethyl-(6CI,8CI); 5-(2-Butenyl)-5-ethylbarbituric acid; 5-Crotyl-5-ethylbarbituricacid; 5-Ethyl-5-crotylbarbituric acid; Barotal; Barotalum; Calypnone;Crotarbital; Crotarbitone; Crotylbarbital; Crotylbarbitalum; Crotylbarbitone;Crotylbital; Go 1046; Kalipnon; Kalypnetten; Kalypnon; Mepertan; NSC 125735