2-Cyano-3-fluoro-6-(trifluoromethoxy)pyridine-5-sulfonamide
2-Cyano-3-fluoro-5-(trifluoromethoxy)pyridine-4-sulfonamide
3-Cyano-6-fluoro-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
3-Bromo-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-carboxylic acid