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