2-Fluoro-4-nitro-6-(trifluoromethoxy)pyridine-3-carboxylic acid
2-Hydroxy-6-methoxy-3-(trifluoromethoxy)pyridine-4-sulfonamide
2-Hydroxy-3-methoxy-4-(trifluoromethoxy)pyridine-5-sulfonamide
4-Hydroxy-5-methoxy-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride