Using O=C1c2[nH]c3cc(Cl)ccc3c(=O)c2C(=O)N1Nc1ccccc1 to produce O=C1NN(c2ccccc2)C(O)c2[nH]c3cc(Cl)ccc3c(=O)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.