2-(Chloromethyl)-5-cyano-3-hydroxy-4-(trifluoromethoxy)pyridine
3-(Difluoromethyl)-2-fluoro-5-methyl-6-(trifluoromethoxy)pyridine
5-Cyano-3-(fluoromethyl)-2-hydroxy-4-(trifluoromethoxy)pyridine
5-Cyano-4-(fluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine