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