2-Hydroxy-4-nitro-6-(trifluoromethoxy)pyridine-3-carboxaldehyde
4-(Chloromethyl)-3-fluoro-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
2-Hydroxy-4-nitro-3-(trifluoromethoxy)pyridine-6-carboxaldehyde
2-Hydroxy-3-nitro-6-(trifluoromethoxy)pyridine-4-carboxaldehyde