Using CC(C)(C)OC(=O)[C@@H](N)Cc1ccccc1, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)CN[C@@H](Cc1ccccc1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.