66414-04-8
diethyl 3-ethyl-5-methylpyrrole-2,4-carboxylate
→
92042-64-3
diethyl 3-ethyl-5-formyl-1H-pyrrole-2,4-dicarboxylate
+
93475-39-9
4-ethyl-pyrrole-2,3,5-tricarboxylic acid-3,5-diethyl ester