Using COc1ccc(S(=O)(=O)C2=CCN(C(=O)OC(C)(C)C)N(S(=O)(=O)c3ccc(OC)cc3)C=C2)cc1 to produce COc1ccc(S(=O)(=O)C2=CCN(C(=O)O)N(S(=O)(=O)c3ccc(OC)cc3)C=C2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.