Ethyl 3-cyano-4-methyl-5-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 3-cyano-2-(fluoromethyl)-4-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 3-cyano-2-methyl-6-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 6-cyano-2-(fluoromethyl)-4-(trifluoromethoxy)pyridine-3-carboxylate