6-(3,4-dimethylanilino)-3-methyl-1H-pyrimidine-2,4-dione

10-ethyl-3-methylpyrimido[4,5-b]quinoline-2,4-dione

3-methyl-6-(2-phenylethylamino)-1H-pyrimidine-2,4-dione

3-methyl-5-nitroso-6-(propylamino)-1H-pyrimidine-2,4-dione

6-azido-1,3-dimethylpyrimidine-2,4-dione