Using C=CCC[Mg]Br, CCOP(=O)(OCC)C(C#N)=CC1CCOCC1 to produce C=CCCC(C1CCOCC1)C(C#N)P(=O)(OCC)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.