Using O=C(c1ccc([N+](=O)[O-])cc1)c1ccc(C(C(=O)[O-])C(=O)[O-])c([N+](=O)[O-])c1 to produce Nc1ccc(C(=O)c2ccc3c(c2)NC(=O)C3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.