Using CC1(C)COC(c2cccc(-c3ccccc3[N+](=O)[O-])c2)=N1, CO to produce COC(=O)c1cccc(-c2ccccc2[N+](=O)[O-])c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.