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