4-Hydroxy-2-methoxy-3-(trifluoromethoxy)pyridine-5-carboxaldehyde
2-Fluoro-3-(fluoromethyl)-5-nitro-6-(trifluoromethoxy)pyridine
5-Hydroxy-3-methoxy-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
3-Hydroxy-5-methoxy-2-(trifluoromethoxy)pyridine-4-carboxaldehyde