Using Cc1nc(C(=O)Nc2ccnc(CO)c2)c(Br)s1, Nc1cc(F)cc(F)c1 to produce Cc1nc(C(=O)Nc2ccnc(CO)c2)c(Nc2cc(F)cc(F)c2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.