Using O=C([O-])C(F)(F)Cl, CSc1ncc(C#N)c(-c2cnc3c(O)cccn23)n1 to produce CSc1ncc(C#N)c(-c2cnc3c(OC(F)F)cccn23)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.