Using COc1cccc(C2=C(C)C(=O)C2(OC)OC)c1, COc1cccc([Mg]Br)c1 to produce COc1cccc(C2=C(C)C(O)(c3cccc(OC)c3)C2=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.