Using O=[N+]([O-])c1ncc[nH]1, CC(=O)OCOC(COC(C)=O)COC(C)=O to produce CC(=O)OCC(COC(C)=O)OCn1ccnc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.