Ethyl 4-(difluoromethyl)-3-fluoro-5-iodopyridine-2-carboxylate
Ethyl 3-(difluoromethyl)-5-fluoro-4-iodopyridine-2-carboxylate
Ethyl 3-(difluoromethyl)-2-fluoro-6-iodopyridine-5-carboxylate
Ethyl 2-(difluoromethyl)-5-fluoro-4-iodopyridine-3-carboxylate