Using CCCCCC[Mg]Br, FC1(F)c2cc(Br)ccc2-c2ccc(Br)cc2C1(F)F to produce CCCCCCc1ccc2c(c1)C(F)(F)C(F)(F)c1cc(CCCCCC)ccc1-2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.