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