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