Ethyl 2-(aminomethyl)-3-cyano-5-(difluoromethyl)pyridine-4-carboxylate
Ethyl 2-(aminomethyl)-3-cyano-4-(difluoromethyl)pyridine-5-carboxylate
Ethyl 2-(aminomethyl)-4-(difluoromethyl)-5-iodopyridine-3-carboxylate
Ethyl 6-(aminomethyl)-4-(difluoromethyl)-3-iodopyridine-2-carboxylate