Using COc1ccc([C@@H](O)[C@H](NC(=O)[C@H](C)NC(=O)CN2CCOCC2)C(=O)OCc2ccccc2)cc1 to produce COc1ccc([C@@H](O)[C@H](NC(=O)[C@H](C)NC(=O)CN2CCOCC2)C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.