5-Cyano-4-nitro-2-(trifluoromethoxy)pyridine-3-sulfonamide
3-Cyano-4-nitro-5-(trifluoromethoxy)pyridine-2-sulfonamide
3-Cyano-2-nitro-6-(trifluoromethoxy)pyridine-5-sulfonamide
6-Cyano-2-nitro-3-(trifluoromethoxy)pyridine-4-sulfonamide
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