Using Nc1ncc(-c2cncc(F)c2)c2cccnc12, Fc1ccc(Br)nc1 to produce Fc1ccc(Nc2ncc(-c3cncc(F)c3)c3cccnc23)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.