4-(Chloromethyl)-2-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxaldehyde
5-(Chloromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
3-Iodo-4-methyl-5-(trifluoromethoxy)pyridine-2-methanol
3-(Chloromethyl)-5-hydroxy-4-(trifluoromethoxy)pyridine-2-carboxaldehyde