3-(Chloromethyl)-2-hydroxy-4-(trifluoromethoxy)pyridine-6-carboxaldehyde
3-Iodo-5-methyl-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
2-(Chloromethyl)-6-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxaldehyde
2-(Chloromethyl)-6-hydroxy-3-(trifluoromethoxy)pyridine-5-carboxaldehyde