Using CC(=O)OCC(=O)[C@@]1(C)[C@H](C)CC2C3CCC4=CC(=O)CC[C@]4(C)C3=CC[C@@]21C to produce C[C@@H]1CC2C3CCC4=CC(=O)CC[C@]4(C)C3=CC[C@]2(C)[C@@]1(C)C(=O)CO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.