Using CC1CN(C(=O)OC(C)(C)C)CCN1c1ccc(O)cc1, COC(=O)CBr to produce COC(=O)COc1ccc(N2CCN(C(=O)OC(C)(C)C)CC2C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.