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