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