Using Fc1cccc(Cl)c1-c1nc2c(Br)cncc2s1, O=C(OO)c1cccc(Cl)c1 to produce [O-][n+]1cc(Br)c2nc(-c3c(F)cccc3Cl)sc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.