Using C=CCOc1c(F)c(Oc2c(F)c(O)c([N+](=O)[O-])c(F)c2F)c(F)c(F)c1[N+](=O)[O-] to produce Nc1c(O)c(F)c(Oc2c(F)c(O)c(N)c(F)c2F)c(F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.