3-Chloro-6-nitro-4-(trifluoromethoxy)pyridine-2-carboxylic acid
4-Bromo-3-(chloromethyl)-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine
4-Chloro-5-nitro-3-(trifluoromethoxy)pyridine-2-carboxylic acid
4-Bromo-3-(chloromethyl)-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine