Using CCOC(=O)c1cn(C2CC2)c2c(C)c(F)c(F)c([N+](=O)[O-])c2c1=O to produce CCOC(=O)c1cn(C2CC2)c2c(C)c(F)c(F)c(N)c2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.