Using CC(=O)OCC(COC(C)=O)n1ccc2c([N+](=O)[O-])cccc2c1=O to produce CC(=O)OCC(COC(C)=O)n1ccc2c(N)cccc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.