Using O=C(O)c1cc2nc(Cl)ccc2[nH]1, NNC(=O)c1ccc(Cl)c(Cl)c1 to produce O=C(NNC(=O)c1cc2nc(Cl)ccc2[nH]1)c1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.