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