Using NCc1ccccc1, CC(C)(C)OC(=O)C(Cc1ccc(Cl)c(Br)c1)C1CCC1 to produce CC(C)(C)OC(=O)C(Cc1ccc(Cl)c(NCc2ccccc2)c1)C1CCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.