Using CCOC(=O)C(C#N)=C1CCC2(CC1)OCC(C)(C)CO2, C=CC[Mg]Cl to produce C=CCC1(C(C#N)CC(=O)OCC)CCC2(CC1)OCC(C)(C)CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.