5-Cyano-2-methoxy-3-(trifluoromethoxy)pyridine-4-acetic acid
4-Chloro-2-(chloromethyl)-5-hydroxy-3-(trifluoromethoxy)pyridine
3-Cyano-4-hydroxy-2-(trifluoromethoxy)pyridine-5-carboxylic acid
3-Cyano-2-hydroxy-4-(trifluoromethoxy)pyridine-5-carboxylic acid