Using O=[N+]([O-])c1cccnc1Nc1ccc(Nc2nc3ccccc3o2)cc1 to produce Nc1cccnc1Nc1ccc(Nc2nc3ccccc3o2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.