Ethyl 2-cyano-5-nitro-3-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 2-(chloromethyl)-4-fluoro-6-(trifluoromethoxy)pyridine-3-acetate
Methyl 3-cyano-5-nitro-2-(trifluoromethoxy)pyridine-4-acetate
Methyl 6-cyano-2-nitro-4-(trifluoromethoxy)pyridine-3-acetate