Ethyl 2-cyano-6-(fluoromethyl)-3-(trifluoromethoxy)pyridine-5-acetate
Methyl 2-fluoro-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-3-acetate
Ethyl 6-cyano-3-(fluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetate
Methyl 2-fluoro-3-methoxy-4-(trifluoromethoxy)pyridine-5-carboxylate