6-Cyano-4-hydroxy-2-(trifluoromethoxy)pyridine-3-carboxylic acid
4-Chloro-2-cyano-3-(trifluoromethoxy)pyridine-5-acetonitrile
2-Cyano-4-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxylic acid
5-Chloro-3-cyano-4-(trifluoromethoxy)pyridine-2-acetonitrile