Using O=P(Br)(Br)Br, [O-][n+]1cc(Br)c2nc(-c3c(F)cccc3Cl)sc2c1 to produce Fc1cccc(Cl)c1-c1nc2c(Br)cnc(Br)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.