3-Chloro-6-cyano-2-(trifluoromethoxy)pyridine-5-acetic acid
5-Chloro-2-cyano-3-(trifluoromethoxy)pyridine-6-acetic acid
4-Chloro-5-(chloromethyl)-3-(trifluoromethoxy)pyridine-2-acetic acid
5-Chloro-3-(chloromethyl)-4-(trifluoromethoxy)pyridine-2-acetic acid