34577-69-0
5-methyl-pyrrole-2,4-dicarboxylic acid 2-ethyl ester 4-methyl ester
→
848498-76-0
4-氰基-5-甲基-1H-吡咯-2-羧酸乙酯
3284-51-3
5-甲基吡咯-2-甲酸乙酯
+
1189-71-5
氯磺酰异氰酸酯
25907-30-6
4-formyl-5-methyl-1H-Pyrrole-2-carboxylic acid ethyl ester