Using C[C@]12C[C@H](N3CCCCC3)CC[C@@H]1CC[C@@H]1[C@@H]2CC[C@]2(C)[C@@H](O)[C@@H](N3CCCCC3)C[C@@H]12, CC(=O)OC(C)=O to produce CC(=O)O[C@H]1[C@@H](N2CCCCC2)C[C@H]2[C@@H]3CC[C@H]4CC[C@@H](N5CCCCC5)C[C@]4(C)[C@H]3CC[C@@]21C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.