3-Cyano-2-(fluoromethyl)-5-(trifluoromethoxy)pyridine-4-acetic acid
6-Cyano-2-(fluoromethyl)-3-(trifluoromethoxy)pyridine-4-acetic acid
3-(Chloromethyl)-4-cyano-2-nitro-6-(trifluoromethoxy)pyridine
2-Cyano-5-(fluoromethyl)-6-(trifluoromethoxy)pyridine-3-acetic acid