Using OB(O)c1cc(Cl)cnc1F, Cc1nc(Cl)c2ncn(C3CCCCO3)c2n1 to produce Cc1nc(-c2cc(Cl)cnc2F)c2ncn(C3CCCCO3)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.