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