Using Nc1ccc(C(=O)O)c([N+](=O)[O-])c1, Nc1c(F)c(F)c(C(=O)O)c(F)c1F to produce CCOC(=O)c1c(F)c(F)c(N)c(F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.