Ethyl 2-(difluoromethyl)-3-iodo-5-nitropyridine-4-carboxylate
Ethyl 2-(difluoromethyl)-3-iodo-6-methylpyridine-5-carboxylate
Methyl 5-(difluoromethyl)-3-iodo-2-nitropyridine-4-carboxylate
Methyl 3-(difluoromethyl)-6-iodo-2-methylpyridine-4-carboxylate