Using Nc1ccc(C(=O)N2CCN(CCc3ccc(Cl)cc3)CC2)cc1, CCOCCCBr to produce CCOCCCNc1ccc(C(=O)N2CCN(CCc3ccc(Cl)cc3)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.