Using CCOC(=O)OCn1nc(C(=O)OCC)c(C(=O)c2cc(OC)c(OC)cc2[N+](=O)[O-])n1 to produce CCOC(=O)OCn1nc(C(=O)OCC)c(C(=O)c2cc(OC)c(OC)cc2N)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.