Using O=C([O-])[O-], COC(=O)[C@@H](Cc1cc(C)c(O)c(C)c1)OC(=O)N1CCC(N2CCc3ccccc3NC2=O)CC1 to produce COC(=O)[C@@H](Cc1cc(C)c(OC)c(C)c1)OC(=O)N1CCC(N2CCc3ccccc3NC2=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.