Using Cc1cccc(C=O)c1OCc1ccccc1, COc1ccc([Mg]Br)cc1 to produce COc1ccc(C(O)c2cccc(C)c2OCc2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.