67464-81-7
ethyl 2-(cyanomethyl)-1H-pyrrole-3-carboxylate
→
65523-04-8
ethyl 2-(2-amino-2-oxoethyl)-1H-pyrrole-3-carboxylate
75938-41-9
ethyl 2-[2-amino-2-(hydroxyimino)ethyl]pyrrole-3-carboxylate