557-21-1
氰化锌
+
89909-40-0
benzyl 4-methyl-1H-pyrrole-3-carboxylate
→
89909-53-5
benzyl 5-formyl-4-methyl-1H-pyrrole-3-carboxylate
71338-71-1
benzyl (2E)-but-2-enoate