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