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