Using C[C@@H]1CN(C(=O)OC(C)(C)C)C[C@H](C)N1, N#CBr to produce C[C@@H]1CN(C(=O)OC(C)(C)C)C[C@H](C)N1C#N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.