Using CCn1c(=O)c(-c2c(Cl)ccc(N)c2F)cc2cnc(Cl)cc21, CN to produce CCn1c(=O)c(-c2c(Cl)ccc(N)c2F)cc2cnc(NC)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.