Using O=C(NCc1ccncc1)c1cc2ccnc(N(Cc3ccccc3)Cc3ccccc3)c2[nH]1 to produce O=C(NCc1ccncc1)c1cc2ccnc(NCc3ccccc3)c2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.