2,4,6(1H,3H,5H)-Pyrimidinetrione, 5-ethyl-5-(1-methylethyl)-, calcium salt (2:1) (9CI) 5-Ethyl-5-isopropylbarbituric acid calcium salt 545-74-4 Barbituric acid, 5-ethyl-5-isopropyl-, calcium salt Calcium ethylisopropylbarbiturate Calcium probarbital Ipral calcium Probarbital calcium