Using OCCO, Cc1ccc(S(=O)(=O)Oc2ccc(C3CCC(=O)CC3)cc2)cc1 to produce Cc1ccc(S(=O)(=O)Oc2ccc(C3CCC4(CC3)OCCO4)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.