Using Nc1ccc(C(=O)O)c(O)c1, O=Cc1cccc([N+](=O)[O-])c1 to produce O=C(O)c1ccc(NCc2cccc([N+](=O)[O-])c2)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.