5-Hydroxy-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxylic acid
4-Fluoro-3-(fluoromethyl)-2-(trifluoromethoxy)pyridine-5-methanol
4-Hydroxy-3-methyl-6-nitro-2-(trifluoromethoxy)pyridine
4-Fluoro-6-(fluoromethyl)-3-(trifluoromethoxy)pyridine-2-methanol