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