Using CCOC(=O)CN1CC(=O)N(C)c2ccccc2C1=O, O=[N+]([O-])[O-] to produce CCOC(=O)CN1CC(=O)N(C)c2ccc([N+](=O)[O-])cc2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.