Using CCOC(=O)c1cc(OCCOC)c(OCCOC)cc1N, O=C(O)c1cc(O)ccc1[N+](=O)[O-] to produce COC(=O)c1cc(O)ccc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.