Ethyl 3-hydroxy-2-nitro-6-(trifluoromethoxy)pyridine-4-acetate
Ethyl 4-hydroxy-3-nitro-5-(trifluoromethoxy)pyridine-2-acetate
Ethyl 2-fluoro-3-(fluoromethyl)-4-(trifluoromethoxy)pyridine-6-carboxylate
Ethyl 5-hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-3-acetate