Using O=C(CC(Cc1cccc2ccccc12)C(=O)O)NCCc1ccccc1, COC(=O)[C@@H](N)Cc1c[nH]cn1 to produce COC(=O)[C@H](Cc1c[nH]cn1)NC(=O)C(CC(=O)NCCc1ccccc1)Cc1cccc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.