3-Chloro-2-(chloromethyl)-4-(trifluoromethoxy)pyridine-5-acetic acid
4-Fluoro-3-(fluoromethyl)-2-iodo-6-(trifluoromethoxy)pyridine
6-Chloro-2-(chloromethyl)-4-(trifluoromethoxy)pyridine-3-acetic acid
2-Chloro-6-(chloromethyl)-3-(trifluoromethoxy)pyridine-4-acetic acid