Using O=S(Cl)Cl, Cc1cc(-c2ccc(C(F)(F)F)cc2)cc(-c2cccc(-c3cccc(S(=O)(=O)O)c3)n2)n1 to produce Cc1cc(-c2ccc(C(F)(F)F)cc2)cc(-c2cccc(-c3cccc(S(=O)(=O)Cl)c3)n2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.