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