54368-61-5
2,6-二氯-5-硝基嘧啶-4-羧酸乙酯
→
59950-50-4
1-(5-氨基-2-氯嘧啶-4-基)-1-丁酮
189747-34-0
2,8-二氯-嘧啶[5,4-D]嘧啶
189747-31-7
6-氯嘧啶并[5,4-d]嘧啶-4(3H)-酮
59950-51-5
ethyl 5-aminopyrimidine-4-carboxylate