Using BrCc1ccccc1, O=C1C[C@@H](NC(=O)OCc2ccccc2)C(=O)N1 to produce O=C(N[C@@H]1CC(=O)N(Cc2ccccc2)C1=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.