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