1,3,7,9-tetramethylpyrimido[5,4-g]pteridine-2,4,6,8-tetrone

4-amino-N-(4-chlorophenyl)-1,3-dimethyl-2,6-dioxopyrimidine-5-carboxamide

8-[(4-氯苯基)氨基]-3,7-二氢-1,3-二甲基-1H-嘌呤-2,6-二酮

1,3,7-trimethyl-10H-benzo[g]pteridine-2,4,8-trione