Using CCOC(=O)[C@H](CCc1ccccc1)N[C@@H](C)C(=O)N1N=C(c2ccccc2)S[C@@H]1C(=O)OCc1ccccc1 to produce CCOC(=O)[C@H](CCc1ccccc1)N[C@@H](C)C(=O)N1N=C(c2ccccc2)S[C@@H]1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.