Using CCC(CC)c1ccc(Br)c2[nH]c(=O)n(C)c12, N#C[Cu]C#N to produce CCC(CC)c1ccc(C#N)c2[nH]c(=O)n(C)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.