Using CCOC(=O)C(=O)Nc1c([N+](=O)[O-])ccc2ncccc12 to produce CCOC(=O)C(=O)Nc1c([N+](=O)[O-])ccc2c1C=CCN2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.