Using CC(C)(C)OC(=O)N1CCN(c2cccc(Br)n2)CC(O)C1 to produce CC(C)(C)OC(=O)N1CCN(c2cccc(Br)n2)CC(=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.