Using O=S(Cl)Cl, Cc1c(C(O)C2CCCCC2)oc2ccc(C#N)cc12 to produce Cc1c(C(Cl)C2CCCCC2)oc2ccc(C#N)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.