Using OB(O)c1ccc(F)nc1, CC1=C(C#N)C(c2ccc3[nH]nc(Br)c3c2)C(C#N)=C2COCCN12 to produce CC1=C(C#N)C(c2ccc3[nH]nc(-c4ccc(F)nc4)c3c2)C(C#N)=C2COCCN12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.