Using O=C(c1ccc(Oc2ccccc2)c([N+](=O)[O-])c1)c1ccc(Oc2ccccc2)c([N+](=O)[O-])c1 to produce Nc1cc(C(=O)c2ccc(Oc3ccccc3)c(N)c2)ccc1Oc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.