Using CC[Mg]Br, CCCCCCC[C@H]1OC(C)(C)O[C@@H]1Cc1ccc(C=O)cc1 to produce CCCCCCC[C@H]1OC(C)(C)O[C@@H]1Cc1ccc(C(O)CC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.