1,6-dimethyl-3-phenylpyrimido[5,4-e][1,2,4]triazine-5,7-dione

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

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

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

4,6-dimethylthiadiazolo[4,5-d]pyrimidine-5,7-dione