Using CCOC(=O)C1C=Nc2c(cccc2[N+](=O)[O-])C1=O to produce O=C(O)C1C=Nc2c(cccc2[N+](=O)[O-])C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.