3-(4-chlorophenyl)-1,6-dimethyl-4-oxidopyrimido[5,4-e][1,2,4]triazin-4-ium-5,7-dione

3-methyl-10-phenylbenzo[g]pteridine-2,4-dione

3-(3,4-dimethoxyphenyl)-1,6-dimethylpyrimido[5,4-e][1,2,4]triazine-5,7-dione

1-[(3-chloro-4-methoxyphenyl)methyl]-6-methoxy-3-methylpyrimidine-2,4-dione

6-ethoxy-1-[(4-methoxy-3-nitrophenyl)methyl]-3-methylpyrimidine-2,4-dione