Using OB(O)c1cccnc1F, NC1=NC2(CCO1)c1cc(I)ccc1Oc1ncc(Br)cc12 to produce NC1=NC2(CCO1)c1cc(-c3cccnc3F)ccc1Oc1ncc(Br)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.