2-Cyano-3-(fluoromethyl)-4-hydroxy-6-(trifluoromethoxy)pyridine
3-(Chloromethyl)-6-cyano-2-hydroxy-5-(trifluoromethoxy)pyridine
6-Chloro-2-hydroxy-3-(trifluoromethoxy)pyridine-4-acetonitrile
2-Chloro-6-hydroxy-4-(trifluoromethoxy)pyridine-3-acetonitrile