Using CC(C)(C)OC(=O)N1CCC(C(=O)c2ccc(O)c([N+](=O)[O-])c2)CC1, COC(=O)CBr to produce COC(=O)COc1ccc(C(=O)C2CCN(C(=O)OC(C)(C)C)CC2)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.