Using O=C([O-])[O-], O=C1CN=C(c2ccccc2Cl)c2cc([N+](=O)[O-])ccc2N1 to produce CN1C(=O)CN=C(c2ccccc2Cl)c2cc([N+](=O)[O-])ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.