Using O=[N+]([O-])c1ccc(Oc2cc(Oc3ccc([N+](=O)[O-])cc3)cc(Oc3ccc([N+](=O)[O-])cc3)c2)cc1 to produce Nc1ccc(Oc2cc(Oc3ccc(N)cc3)cc(Oc3ccc(N)cc3)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.