Using NCc1ccccc1, O=C(O)c1cccc(Nc2ncnc3cc[nH]c23)c1 to produce O=C(NCc1ccccc1)c1cccc(Nc2ncnc3cc[nH]c23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.