Using COC(=O)CC(=O)OC, O=[N+]([O-])c1ccc(F)cc1F to produce COC(=O)C(C(=O)OC)c1cc(F)ccc1[N+](=O)[O-], please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.