Using CC(C)(C)ON, COc1ccc(S(=O)(=O)N2CCN(C(=O)OCc3ccccc3)CC2C(=O)O)cc1 to produce COc1ccc(S(=O)(=O)N2CCN(C(=O)OCc3ccccc3)CC2C(=O)NOC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.