Using CCC(O)CCN(C)C(=O)OC(C)(C)C, Oc1cc(Cl)ccc1Cl to produce CCC(CCN(C)C(=O)OC(C)(C)C)Oc1cc(Cl)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.