Using BrCc1ccccc1, COC1(OC)CCN(C(=O)OC(C)(C)C)CC1O to produce COC1(OC)CCN(C(=O)OC(C)(C)C)CC1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.