Methyl 2-hydroxy-5-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 3-hydroxy-5-nitro-6-(trifluoromethoxy)pyridine-2-carboxylate
5-Hydroxy-3-nitro-4-(trifluoromethoxy)pyridine-2-acetic acid
Methyl 3-hydroxy-5-nitro-2-(trifluoromethoxy)pyridine-6-carboxylate