73810-73-8
ethyl 3-(1-methyl-3-pyrazolylamino)-crotonate
→
~85%
35149-49-6
1,5-dimethylpyrazolo[1,5-a]pyrimidin-7-one
141-97-9
乙酰乙酸乙酯
+
1904-31-0
N-甲基-3-氨基吡唑
~81%