Using O=C(O)c1c(-c2cccc([N+](=O)[O-])c2)oc2ncnc(O)c12 to produce O=[N+]([O-])c1cccc(-c2cc3c(O)ncnc3o2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.