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