Using O=C(Nc1cc(-c2ccccc2)ccc1C(=O)O)c1cccc([N+](=O)[O-])c1 to produce Nc1cccc(C(=O)Nc2cc(-c3ccccc3)ccc2C(=O)O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.