Using CCCCOC(=O)N1CCN(C(=O)CNC(=O)c2cc(O[C@H](C)C(=O)OCc3ccccc3)n(-c3ccccc3)n2)CC1 to produce CCCCOC(=O)N1CCN(C(=O)CNC(=O)c2cc(O[C@H](C)C(=O)O)n(-c3ccccc3)n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.