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