4-Cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-6-acetic acid
4-Cyano-2-(difluoromethyl)-6-(trifluoromethoxy)pyridine-3-acetic acid
2-(Chloromethyl)-3-cyano-5-hydroxy-6-(trifluoromethoxy)pyridine
4-Cyano-3-fluoro-2-iodo-5-(trifluoromethoxy)pyridine