Using NCCN, CS(=O)(=O)n1cc(CC#N)c2cc(F)c(Br)cc21 to produce CS(=O)(=O)n1cc(CC2=NCCN2)c2cc(F)c(Br)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.