Using CCOC(=O)[C@H](CCCCC1CCN(C(=O)OC(C)(C)C)CC1)N[C@H]1CS[C@H](c2cccs2)CN(CC(=O)OC(C)(C)C)C1=O to produce CCOC(=O)[C@H](CCCCC1CCNCC1)N[C@H]1CS[C@H](c2cccs2)CN(CC(=O)O)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.