Using O=C(O)c1ccc([N+](=O)[O-])c(C(F)(F)F)c1, O=C([O-])O to produce COC(=O)c1ccc([N+](=O)[O-])c(C(F)(F)F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.