Using CCOC(=O)C(C(=O)OCC)=C(C)C, COc1ccc(C[Mg]Cl)cc1 to produce CCOC(=O)C(C(=O)OCC)C(C)(C)Cc1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.