Using [Cl-], CCn1c(-c2ccncc2)c(-c2ccc(F)cc2)[nH]c1=O to produce CCn1c(Cl)nc(-c2ccc(F)cc2)c1-c1ccncc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.