Using CCOC(=O)C1=C(O)c2ccccc2[C@@](C)(CCC(C)(C)C)C1=O to produce CC(C)(C)CC[C@@]1(C)C(=O)C=C(O)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.