5-Chloro-2-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxaldehyde
6-Chloro-3-(chloromethyl)-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
3-Bromo-4-(fluoromethyl)-5-(trifluoromethoxy)pyridine-2-carboxaldehyde
6-Chloro-4-(chloromethyl)-3-(trifluoromethoxy)pyridine-2-carboxaldehyde