Using CC(=O)OCc1cc(C(=O)CNC(C)(C)C)ccc1Oc1ccccc1C, CS(=O)(=O)O to produce CC(=O)OCc1cc(C(CNC(C)(C)C)OS(C)(=O)=O)ccc1Oc1ccccc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.