Using CC(C)CCC[C@@H](C)[C@H]1CC[C@@]2(C#N)[C@@H]3C(O)C[C@H]4C(C)(C)[C@@H](OC(=O)c5ccccc5)CC[C@]4(C)[C@H]3CC[C@]12C to produce CC(C)CCC[C@@H](C)[C@H]1CC[C@@]2(C#N)C3=CC[C@H]4C(C)(C)[C@@H](OC(=O)c5ccccc5)CC[C@]4(C)[C@H]3CC[C@]12C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.