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