4-Hydroxy-5-(trifluoromethoxy)pyridine-2-sulfonamide
4-Hydroxy-2-(trifluoromethoxy)pyridine-6-sulfonamide
5-Hydroxy-4-(trifluoromethoxy)pyridine-2-sulfonamide
3-Hydroxy-2-(trifluoromethoxy)pyridine-6-sulfonamide
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