Using C[C@@H]([C@@H](CCCc1ccccc1)C(=O)O)N(C=O)OC1CCCCO1, CNC(=O)[C@@H](N)C(C)(C)C to produce CNC(=O)[C@@H](NC(=O)[C@H](CCCc1ccccc1)[C@H](C)N(C=O)OC1CCCCO1)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.