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