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