4,5-二氢-4-氧代-3H-吡咯并[3,2-d]嘧啶-7-羧酸甲酯

2,7-Dibromo-4-oxo-3,4-dihydropyrrolo[3,2-d]pyrimidine

4-Oxo-3,4-dihydropyrrolo[3.2-d]pyrimidine-7-carboxylic acid

8-oxo-7H-2-phenylpyrimido[5,4-c]pyridazin-6-thione

2-(2-氰基-乙烯基氨基)-丙二酸二乙酯