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