Using NCc1ccccc1Cl, CC(C)(C)OC(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)O to produce CC(C)(C)OC(=O)NC(Cc1c[nH]c2ccccc12)C(=O)NCc1ccccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.