5-Hydroxy-2-nitro-3-(trifluoromethoxy)pyridine-6-carboxaldehyde
Methyl 6-hydroxy-3-iodo-2-(trifluoromethoxy)pyridine-4-carboxylate
3-(Bromomethyl)-6-hydroxy-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
4-Hydroxy-3-nitro-6-(trifluoromethoxy)pyridine-2-carboxaldehyde