Using O=[N+]([O-])O, Cc1c(C(F)(F)F)ncn(-c2ccc(F)cc2F)c1=O to produce Cc1c(C(F)(F)F)ncn(-c2cc([N+](=O)[O-])c(F)cc2F)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.