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