Using O=C(O)c1ccccc1, CC(C)Nc1cc(Cl)ncc1C(=O)NN to produce CC(C)Nc1cc(Cl)ncc1C(=O)NNC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.