Using NNC(=O)NN, O=S(=O)(Cl)c1ccc(Cl)cc1 to produce O=C(NNS(=O)(=O)c1ccc(Cl)cc1)NNS(=O)(=O)c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.