Using COc1cc2c(c(OC)c1)C1=C(CC2)C2=CC[C@H](OC(C)=O)[C@@]2(C)CC1 to produce COc1cc2c(c(OC)c1)C1=C(CC2)[C@@H]2CC[C@H](OC(C)=O)[C@@]2(C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.