Using CC(C)Oc1cccc2c1CCCC(=O)N2, O=[N+]([O-])[O-] to produce CC(C)Oc1c([N+](=O)[O-])ccc2c1CCCC(=O)N2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.