Using CC(C)(Nc1cc(Cl)ccc1[N+](=O)[O-])C(=O)O, O=C([O-])[O-] to produce COC(=O)C(C)(C)Nc1cc(Cl)ccc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.