3-Bromo-6-(chloromethyl)-2-(difluoromethyl)pyridine-5-carboxylic acid
5-Bromo-3-(bromomethyl)-2-(difluoromethyl)-4-methylpyridine
5-Bromo-3-(bromomethyl)-4-(difluoromethyl)-2-methylpyridine
5-Bromo-2-(chloromethyl)-3-(difluoromethyl)pyridine-4-carboxylic acid