2-Cyano-5-fluoro-3-(trifluoromethoxy)pyridine-6-carboxylic acid
2-Cyano-4-fluoro-6-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Chloro-4-methoxy-6-(trifluoromethoxy)pyridine-2-acetonitrile
2-Cyano-4-fluoro-3-(trifluoromethoxy)pyridine-6-carboxylic acid