Using CC(C)(C)OC(=O)N[C@H](CO)Cc1ccccc1, CC(C)(C)OC(=O)c1ccc(CBr)cc1 to produce CC(C)(C)OC(=O)N[C@H](COCc1ccc(C(=O)OC(C)(C)C)cc1)Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.