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