Using OB(O)c1cncnc1, O=C(Nc1ccc(OC(F)(F)F)cc1)c1cnc(C(F)(F)F)c(Br)c1 to produce O=C(Nc1ccc(OC(F)(F)F)cc1)c1cnc(C(F)(F)F)c(-c2cncnc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.