3-(Chloromethyl)-6-cyano-4-(trifluoromethoxy)pyridine-2-acetic acid
3-Fluoro-2-iodo-4-(trifluoromethoxy)pyridine-6-carboxylic acid
4-(Chloromethyl)-5-cyano-3-(trifluoromethoxy)pyridine-2-acetic acid
2-Fluoro-6-iodo-5-(trifluoromethoxy)pyridine-3-carboxylic acid