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