Methyl 3-hydroxy-2-nitro-6-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 2-hydroxy-6-iodo-3-(trifluoromethoxy)pyridine-4-acetate
Methyl 3-hydroxy-2-nitro-5-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 6-hydroxy-2-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate