Using COc1cccc([Mg]Br)c1, CN(C)C1(c2ccccc2)CCC(=O)CC1 to produce COc1cccc(C2(O)CCC(c3ccccc3)(N(C)C)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.