Using O=S(=O)(Nc1ncns1)N1CCc2c(Br)cccc2C1, OB(O)c1ccc(C(F)(F)F)cc1 to produce O=S(=O)(Nc1ncns1)N1CCc2c(cccc2-c2ccc(C(F)(F)F)cc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.