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