2-Cyano-5-hydroxy-3-(trifluoromethoxy)pyridine-6-acetic acid
6-Cyano-3-(fluoromethyl)-2-hydroxy-4-(trifluoromethoxy)pyridine
2-Cyano-5-(fluoromethyl)-3-hydroxy-6-(trifluoromethoxy)pyridine
2-Cyano-4-(fluoromethyl)-6-hydroxy-3-(trifluoromethoxy)pyridine