2-Methoxy-6-nitro-3-(trifluoromethoxy)pyridine-5-carboxaldehyde
5-(Bromomethyl)-2-methoxy-3-(trifluoromethoxy)pyridine-6-carboxaldehyde
6-Methoxy-3-nitro-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
4-(Bromomethyl)-3-methoxy-6-(trifluoromethoxy)pyridine-2-carboxaldehyde