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