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