Using [O-][Cl+2]([O-])[O-], O=c1ccc([N+](=O)[O-])c[nH]1 to produce O=c1[nH]cc([N+](=O)[O-])cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.