10-(3,4-dimethylphenyl)-3-methylbenzo[g]pteridine-2,4-dione

3-methyl-10-phenylpyrimido[4,5-b]quinoline-2,4-dione

3-methyl-6-phenylsulfanyl-1H-pyrimidine-2,4-dione

3-methyl-2,4-dioxo-6-phenylsulfanyl-1H-pyrimidine-5-carbaldehyde

N-(6-chloro-3-methyl-2,4-dioxo-1H-pyrimidin-5-yl)formamide