Using O=C(Nc1cnc(Br)cn1)c1c(F)cccc1F, OB(O)c1cc(C(F)(F)F)ccc1Cl to produce O=C(Nc1cnc(-c2cc(C(F)(F)F)ccc2Cl)cn1)c1c(F)cccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.