6-(Bromomethyl)-2-cyano-3-hydroxy-4-(trifluoromethoxy)pyridine
4-Chloro-3-(chloromethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine
2-(Bromomethyl)-6-cyano-4-hydroxy-3-(trifluoromethoxy)pyridine
4-Chloro-2-(chloromethyl)-6-hydroxy-3-(trifluoromethoxy)pyridine