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