7-溴吡啶并[2,3-B]吡嗪-2,3(1H,4H)-二酮

2,5-二溴-3-硝基吡啶

6-溴-3H-咪唑并[4,5-B]嘧啶-2甲醇

5-ethenyl-3-nitropyridin-2-amine

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