5-Cyano-2-hydroxy-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride
5-Chloro-4-hydroxy-3-(trifluoromethoxy)pyridine-2-sulfonamide
2-Amino-4-bromo-5-hydroxy-3-(trifluoromethoxy)pyridine
2-(Difluoromethyl)-3,4,5-trihydroxypyridine
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