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