mephobarbital1-methylphenobarbital5-Ethyl-1-methyl-5-phenyl-pyrimidine-2,4,6-trione5-ethyl-1-methyl-5-phenyl-2,4,6(1H,3H,5H)-pyrimidinetrione5-ethyl-1-methyl-5-phenylbarbituric acidMebaralMephobarbitalMephobarbitoneN-methylphenobarbitalmethylphenobarbital