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