Using OB(O)c1cccnc1F, CC(C)n1ncnc1-c1cn2c(n1)-c1cc(Br)ccc1OCC2 to produce CC(C)n1ncnc1-c1cn2c(n1)-c1cc(-c3cccnc3F)ccc1OCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.