Using CC(C)[C@H](NC(=O)[C@H](C)N(C)C(=O)OC(C)(C)C)C(=O)N1CCNC[C@H]1C(=O)N[C@@H]1CCCc2ccccc21, CC(C)C=O to produce CC(C)CN1CCN(C(=O)[C@@H](NC(=O)[C@H](C)N(C)C(=O)OC(C)(C)C)C(C)C)[C@H](C(=O)N[C@@H]2CCCc3ccccc32)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.