3-methyl-1H-benzo[g]pteridine-2,4-dione

1,7-二甲基-2,6,8-三羟基嘌呤

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

1-甲基咪唑烷-2,4,5-三酮

3,10-dimethylpyrido[4,3-g]pteridine-2,4-dione