Using CC(=O)O[C@@H]1CC2=CC=C3[C@@H]4CC[C@H](C(C)C5OCCO5)[C@@]4(C)CC[C@@H]3[C@@]2(C)[C@@H](OC(=O)c2ccccc2)C1 to produce CC(=O)O[C@@H]1CC2=CC=C3[C@@H]4CC[C@H](C(C)C=O)[C@@]4(C)CC[C@@H]3[C@@]2(C)[C@@H](OC(=O)c2ccccc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.