5-Cyano-4-hydroxy-2-(trifluoromethoxy)pyridine-3-sulfonamide
3-Cyano-2-hydroxy-5-(trifluoromethoxy)pyridine-4-sulfonamide
6-Cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-4-sulfonamide
5-Chloro-2-iodo-3-methoxy-4-(trifluoromethoxy)pyridine
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