3-Bromo-2-(difluoromethyl)-4-methoxypyridine-5-carboxylic acid
2-Bromo-6-(difluoromethyl)-5-methoxypyridine-3-carboxylic acid
4-Bromo-3-(difluoromethyl)-2-nitropyridine-6-sulfonyl chloride
4-Bromo-6-(difluoromethyl)-2-nitropyridine-3-sulfonyl chloride