Using OB(O)c1ccccc1F, Cn1c(=O)n(C(=O)N2CCCC2)c2cnc(Cl)nc21 to produce Cn1c(=O)n(C(=O)N2CCCC2)c2cnc(-c3ccccc3F)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.