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