Using COC(=O)c1ccc(OCc2ccc3ccc(Cl)cc3n2)c(C(=O)OC)c1 to produce COC(=O)c1ccc2oc(-c3ccc4ccc(Cl)cc4n3)c(O)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.