Using CCCc1c(C=O)cc([N+](=O)[O-])c(OC)c1O, O=C([O-])[O-] to produce CCCc1c(C=O)cc([N+](=O)[O-])c(OC)c1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.