2-Hydroxy-6-methoxy-3-(trifluoromethoxy)pyridine-4-acetic acid
3-Fluoro-4-(fluoromethyl)-6-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Fluoro-4-(fluoromethyl)-2-(trifluoromethoxy)pyridine-6-carboxylic acid
6-Hydroxy-3-methoxy-4-(trifluoromethoxy)pyridine-2-acetic acid