Using O=C(OCc1ccccc1)N1CCN(c2nc3nccc(-c4cccnc4)n3n2)CC1 to produce c1cncc(-c2ccnc3nc(N4CCNCC4)nn23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.