Using COC(=O)c1c(Br)csc1NC(=O)Cc1cccc2cnccc12, N#C[Cu] to produce COC(=O)c1c(C#N)csc1NC(=O)Cc1cccc2cnccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.