Using COc1ccc(Oc2c(Cl)cc([N+](=O)[O-])cc2Cl)cc1C(C)C to produce CC(C)c1cc(Oc2c(Cl)cc([N+](=O)[O-])cc2Cl)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.