Using COC(=O)[C@@]1(NC(=O)[C@@H]2CCCCN2C(=O)OC(C)(C)C)C[C@@H]1c1ccc(Br)cc1 to produce CC(C)(C)OC(=O)N1CCCC[C@H]1C(=O)N[C@]1(C(=O)O)C[C@@H]1c1ccc(Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.