Using O=c1c2cc(Cl)ccc2nc(CCl)n1-c1ccccc1Cl, Sc1ncnc2nc[nH]c12 to produce O=c1c2cc(Cl)ccc2nc(CSc2ncnc3[nH]cnc23)n1-c1ccccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.