Using COC(=O)Oc1cc([N+](=O)[O-])c(C(C)(C)C)cc1Cl to produce CC(C)(C)c1cc(Cl)c(O)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.