Using CC(C)NC(=O)NC(C)C, CC12CC3CC(C)(C1)CC(Br)(C3)C2 to produce CC(C)N(C)C12CC3CC(C)(CC(C)(C3)C1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.