Using O=S(Cl)Cl, COc1cc2nc(C)[nH]c(=O)c2cc1OCCCN1CCOCC1 to produce COc1cc2nc(C)nc(Cl)c2cc1OCCCN1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.