3-Hydroxy-5-iodo-4-nitro-2-(trifluoromethoxy)pyridine
5-Hydroxy-4-iodo-2-nitro-3-(trifluoromethoxy)pyridine
3-Cyano-6-(fluoromethyl)-2-(trifluoromethoxy)pyridine-5-carboxylic acid
5-Cyano-2-(fluoromethyl)-3-(trifluoromethoxy)pyridine-6-carboxylic acid