Using COC(=O)[C@H](CCCC1CCN(C(=O)OCc2ccccc2)CC1)NC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N[C@@H](CCCC1CCN(C(=O)OCc2ccccc2)CC1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.