Using CC(C)(C)[C@H]1OC(=O)C(c2ccccc2)O1, O=C1CCCCC1 to produce CC(C)(C)[C@H]1OC(=O)[C@](c2ccccc2)(C2(O)CCCCC2)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.