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