Using N#C[Cu], CCCCC[C@H]1CC[C@H](CCc2ccc(OC(=O)c3ccc(OCCCCC[C@@H](C)CC)cc3)c(Br)c2)CC1 to produce CCCCC[C@H]1CC[C@H](CCc2ccc(OC(=O)c3ccc(OCCCCC[C@@H](C)CC)cc3)c(C#N)c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.