632365-54-9
5-氨基-1H-吡唑-3-羧酸甲酯
+
2065-75-0
2-溴丙二醛
→
~19%
1005209-40-4
Methyl 6-bromopyrazolo[1,5-a]pyrimidine-2-carboxylate
181585-93-3
5-硝基-1H-吡唑-3-羧酸甲酯