Using CC(=O)OCCC(CN(CC(CCOC(C)=O)([N+](=O)[O-])[N+](=O)[O-])[N+](=O)[O-])([N+](=O)[O-])[N+](=O)[O-] to produce O=[N+]([O-])N(CC(CCO)([N+](=O)[O-])[N+](=O)[O-])CC(CCO)([N+](=O)[O-])[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.