Using COC(=O)c1ccc2c(CN3C(=O)[C@@H](NC(=O)[C@H](C)N(C)C(=O)OC(C)(C)C)COc4ccccc43)c(OC)ccc2c1 to produce COc1ccc2cc(C(=O)O)ccc2c1CN1C(=O)[C@@H](NC(=O)[C@H](C)N(C)C(=O)OC(C)(C)C)COc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.