Ethyl 3-bromo-4-(difluoromethyl)-2-nitropyridine-5-carboxylate
Ethyl 3-bromo-2-(difluoromethyl)-6-nitropyridine-4-carboxylate
Ethyl 3-bromo-2-(difluoromethyl)-4-nitropyridine-5-carboxylate
6-Bromo-2-(difluoromethyl)-4-methylpyridine-3-sulfonyl chloride