3-Chloro-5-nitro-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
5-Chloro-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxaldehyde
3-Chloro-4-nitro-2-(trifluoromethoxy)pyridine-5-carboxaldehyde
3-Chloro-2-nitro-5-(trifluoromethoxy)pyridine-6-carboxaldehyde