Using CC(C)(C)OC(=O)CN1C(=O)c2ccc([N+](=O)[O-])cc2C1=O to produce CC(C)(C)OC(=O)CN1C(=O)c2ccc(N)cc2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.