Using O=C(Cl)c1ccc(CCN2CCN(Cc3ccccc3Cl)CC2)cc1, CCN(CC)CCO to produce CCN(CC)CCOC(=O)c1ccc(CCN2CCN(Cc3ccccc3Cl)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.