5-Cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-4-sulfonamide
4-Cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-5-acetic acid
4-Cyano-5-hydroxy-3-(trifluoromethoxy)pyridine-2-sulfonamide
5-Cyano-3-hydroxy-4-(trifluoromethoxy)pyridine-2-acetic acid
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