Using CI, COc1ccc(Cl)cc1C1(O)CCN(C(=O)OC(C)(C)C)CC1 to produce COc1ccc(Cl)cc1C1(OC)CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.