Using COC(=O)[C@H]1C[C@@H](CCBr)CCN1C(=O)OC(C)(C)C, [C-]#N to produce COC(=O)[C@H]1C[C@@H](CCC#N)CCN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.