186581-53-3
重氮甲烷
+
135641-91-7
3-(4-氯苯基)-1H-吡唑-4-羧酸
→
~40%
135641-70-2
3(5)-(4-氯苯基)-1H-吡唑-4-羧酸甲酯
109842-38-8
dimethyl 2-(4-chlorophenyl)maleate