Using CS(=O)(=O)c1ccc(Cl)cc1, Oc1ccc(Cl)c(Cl)c1 to produce CS(=O)(=O)c1ccc(Oc2ccc(Cl)c(Cl)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.