Using COc1ccc(C(NC(=O)C[C@H](NC(=O)OCc2ccccc2)C(=O)N[C@H](C(=O)O)[C@@H](C)N[C@@H](Cc2c[nH]c3ccccc23)C(=O)O)c2ccc(OC)cc2)cc1 to produce COc1ccc(C(NC(=O)C[C@H](N)C(=O)N[C@H](C(=O)O)[C@@H](C)N[C@@H](Cc2c[nH]c3ccccc23)C(=O)O)c2ccc(OC)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.