Using CSc1ncc(Cl)c(C(=O)NNC(=S)Nc2ccc(F)cc2)n1 to produce CSc1ncc(Cl)c(-c2nnc(Nc3ccc(F)cc3)s2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.