Using CN(C)C(=O)Sc1ccc(CNc2c(Cl)ccc3c2CCN(C(=O)OC(C)(C)C)CC3)cc1, COC(=O)CBr to produce COC(=O)CSc1ccc(CNc2c(Cl)ccc3c2CCN(C(=O)OC(C)(C)C)CC3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.