2-Cyano-4-nitro-3-(trifluoromethoxy)pyridine-5-sulfonamide
2-Chloro-4-nitro-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-Cyano-3-nitro-5-(trifluoromethoxy)pyridine-6-sulfonamide
5-Cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-methanol