Using CC(=O)OC(C)=O, C[C@]12CCC(=O)CC1[C@@H](CO)C[C@@H]1[C@@H]2CC[C@]2(C)C(=O)CC[C@@H]12 to produce CC(=O)OC[C@H]1C[C@@H]2[C@H](CC[C@]3(C)C(=O)CC[C@@H]23)[C@@]2(C)CCC(=O)CC12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.