Using O=[N+]([O-])c1c(-c2cccs2)c(F)c(F)c(-c2cccs2)c1[N+](=O)[O-] to produce Nc1c(N)c(-c2cccs2)c(F)c(F)c1-c1cccs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.