Using CCOC(=O)c1cn2c3c(c(F)c(F)c([N+](=O)[O-])c3c1=O)OCC21CCC1 to produce CCOC(=O)c1cn2c3c(c(F)c(F)c(N)c3c1=O)OCC21CCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.