Using COC(=O)C(Cc1ccc(OCCc2ccc(OS(C)(=O)=O)cc2)cc1)OC(C)C to produce CC(C)OC(Cc1ccc(OCCc2ccc(OS(C)(=O)=O)cc2)cc1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.