Using CC(C)(C)OC(=O)N[C@@H](CCO)C(=O)O, BrCc1ccc(Br)cc1 to produce CC(C)(C)OC(=O)N[C@@H](CCOCc1ccc(Br)cc1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.