Using O=S(Cl)Cl, CC(=O)Oc1cc2ccc(S(=O)(=O)[O-])cc2cc1OC(C)=O to produce CC(=O)Oc1cc2ccc(S(=O)(=O)Cl)cc2cc1OC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.