Using Nc1ccc(C(=O)c2ccccc2C(=O)[O-])cc1[N+](=O)[O-] to produce Nc1ccc(C2OC(=O)c3ccccc32)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.