1260243-04-6
5-氨基-1H-吡唑-4羧酸乙酯
+
123-54-6
乙酰丙酮
→
52664-01-4
Ethyl 5,7-dimethylpyrazolo[1,5-a]pyrimidine-3-carboxylate
6994-25-8
3-氨基-4-吡唑甲酸乙酯