Using O=C(Cl)c1ccncc1, O=C([C@@H]1CSCN1)N1CCSC1 to produce O=C([C@@H]1CSCN1C(=O)c1ccncc1)N1CCSC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.