Using O=S(Cl)Cl, CCn1c(C)nc2cc(C(O)CN3CCN(C(c4ccccc4)c4ccccc4)CC3)ccc21 to produce CCn1c(C)nc2cc(C(Cl)CN3CCN(C(c4ccccc4)c4ccccc4)CC3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.