Using CC1(C)Oc2cc([N+](=O)[O-])c(NC(=O)c3ccccc3)cc2C(O)C1Br to produce CC1(C)Oc2cc([N+](=O)[O-])c(NC(=O)c3ccccc3)cc2C2OC21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.