Using CC(C)(C)OC(=O)N1C[C@H](Br)[C@H]2OC[C@H](O)[C@H]21 to produce O[C@H]1CO[C@H]2[C@@H]1NC[C@@H]2Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.