Using [NH4+], CC1(c2cc(Br)c(F)cc2F)NC(=S)Cn2nccc21 to produce CC1(c2cc(Br)c(F)cc2F)NC(N)=Cn2nccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.