Using COC(=O)C1CCC[C@]2(CC[C@@H](O[Si](c3ccccc3)(c3ccccc3)C(C)(C)C)C2)C1O to produce COC(=O)C1=C[C@]2(CCC1)CC[C@@H](O[Si](c1ccccc1)(c1ccccc1)C(C)(C)C)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.