Metabarbital, 5,5-diethyl-N-methyl-barbituric acid, Endiemal, Endiemalum, 1-methyl-5,5-diethylbarbituric acid, Methabarbital, N-Methylbarbital, 2,4,6(1H,3H,5H)-Pyrimidinetrione, 5,5-diethyl-1-methyl-, Metharbitone, Metharbutal, 5,5-Diethyl-1-methylbarbitursaeure, Methylbarbital, Gemonil, metharbital, 5,5-Diaethyl-1-methyl-2,4,6-trioxo-hexahydropyrimidin