Ethyl 4-bromo-3-(difluoromethyl)-2-nitropyridine-5-carboxylate
Ethyl 2-bromo-3-(difluoromethyl)-4-methylpyridine-5-carboxylate
Methyl 4-bromo-3-(difluoromethyl)-5-iodopyridine-2-acetate
Methyl 5-bromo-2-(difluoromethyl)-3-methylpyridine-4-carboxylate