186581-53-3
重氮甲烷
+
110-17-8
富马酸
→
87387-81-3
dimethyl 4,5-dihydro-1H-pyrazole-3,4-dicarboxylate
624-48-6
马来酸二甲酯
126416-42-0
dimethyl 4,5-dihydro-3H-pyrazole-3,4-dicarboxylate