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