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