Using Nc1ncccc1Br, COC(=O)CC1=CCN(C(=O)OCc2ccccc2)CC1 to produce O=C(CC1=CCN(C(=O)OCc2ccccc2)CC1)Nc1ncccc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.