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