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