Using C=C1C[C@@H]2C(=CC[C@@]3(C)[C@H]2C[C@H](C)[C@]3(O)C(=O)COC(C)=O)[C@@]2(C)CCC(=O)C=C12 to produce CC(=O)OCC(=O)[C@@]1(O)[C@@H](C)C[C@H]2[C@@H]3C[C@H](C)C4=CC(=O)CC[C@]4(C)C3=CC[C@@]21C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.