2-(Chloromethyl)-3-hydroxy-4-(trifluoromethoxy)pyridine-6-carboxaldehyde
2-(Fluoromethyl)-6-methoxy-3-(trifluoromethoxy)pyridine-5-carboxaldehyde
6-(Fluoromethyl)-3-methoxy-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
2-(Fluoromethyl)-5-methoxy-3-(trifluoromethoxy)pyridine-6-carboxaldehyde