Using CNS(=O)(=O)c1ccc(C2Nc3ccc(C(=O)OC)cc3CC2(C)C)cc1 to produce CNS(=O)(=O)c1ccc(C2Nc3ccc(C(=O)O)cc3CC2(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.