Using CC(C)(C)OC(=O)N1CCC(=O)N(CC2CC2)CC1c1ccccc1, BrBr to produce CC(C)(C)OC(=O)N1CC(Br)C(=O)N(CC2CC2)CC1c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.