Using COC(C)(C)CCCC(C)CC[Mg]Cl, CC(C)c1ccc(C=O)cc1 to produce COC(C)(C)CCCC(C)CCC(O)c1ccc(C(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.