Using CCOC(=O)c1nc(Cl)c2ccccc2n1, COc1cc([Mg]Br)ccc1F to produce COc1cc(C(=O)c2nc(Cl)c3ccccc3n2)ccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.