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