Using O=S(Cl)Cl, CCc1sc(C2(O)CCSCC2)cc1C(O)C1CCCCC1 to produce CCc1sc(C2=CCSCC2)cc1C(Cl)C1CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.