Using COc1ccc(N(C)C(=O)[C@H](Cc2cccc(I)c2)NC(=O)OC(C)(C)C)cc1, C=CCC[Mg]Br to produce C=CCCc1cccc(C[C@H](NC(=O)OC(C)(C)C)C(=O)N(C)c2ccc(OC)cc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.