Using O=C(Nc1nccs1)c1nc(-c2ccc([N+](=O)[O-])cc2)[nH]c1-c1ccc([N+](=O)[O-])cc1 to produce Nc1ccc(-c2nc(C(=O)Nc3nccs3)c(-c3ccc(N)cc3)[nH]2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.