Using CC(C)(C)OC(=O)N[C@@H](CCCCCBr)C(=O)O, Nc1ccccc1 to produce CC(C)(C)OC(=O)N[C@@H](CCCCCBr)C(=O)Nc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.