Using Clc1cc(Cl)cc(Cl)c1, CC(C)(C)S to produce CC(C)(Cc1cc(Cl)cc(Cl)c1)SC(C)(C)Cc1cc(Cl)cc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.