Using Oc1ccc(Cl)c(O)c1, O=C(O)Cc1ccc2c(c1)OCCO2 to produce O=C(Cc1ccc2c(c1)OCCO2)c1cc(Cl)c(O)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.