Using CC(C)CCC(=O)O, CC(=O)N[C@H](Cc1ccccc1)[C@H](O)[C@H]1CNCCN1C(=O)OC(C)(C)C to produce CC(=O)N[C@H](Cc1ccccc1)[C@H](O)[C@H]1CN(C(=O)CCC(C)C)CCN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.