Using COc1ccc2c(c1)CCN(S(=O)(=O)c1ccc(C)cc1)CC2=O to produce COc1ccc2c(c1)CCN(S(=O)(=O)c1ccc(C)cc1)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.