Using C1COCCN1, O=C(O)c1ccc([N+](=O)[O-])cc1[N+](=O)[O-] to produce O=C(c1ccc([N+](=O)[O-])cc1[N+](=O)[O-])N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.