Using COC(=O)C(O)C(O)c1ccc(OC)cc1, Cc1ccc(S(=O)(=O)O)cc1 to produce COC(=O)C1OC(C)(C)OC1c1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.