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