2-(Chloromethyl)-3-hydroxy-4-iodo-6-(trifluoromethoxy)pyridine
3-(Bromomethyl)-6-hydroxy-4-nitro-2-(trifluoromethoxy)pyridine
3-(Bromomethyl)-6-hydroxy-2-iodo-5-(trifluoromethoxy)pyridine
5-(Bromomethyl)-2-hydroxy-3-nitro-4-(trifluoromethoxy)pyridine