Using Cc1cc(Br)cc(C)c1/C=C/C1CCN(C(=O)OC(C)(C)C)CC1, CCC#N to produce Cc1cc(C#N)cc(C)c1/C=C/C1CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.