Using O=S(O)c1ccccc1, COc1ccc(CC2CCC(OC)O2)cc1OC to produce COc1ccc(C2CCC(S(=O)(=O)c3ccccc3)O2)cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.