Using O=C(O)c1cc2nc(Cl)nc(N3CCOCC3)c2o1, CS(=O)(=O)N1CCNCC1 to produce CS(=O)(=O)N1CCN(C(=O)c2cc3nc(Cl)nc(N4CCOCC4)c3o2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.