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