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