Using O=[N+]=O, O=C(NCCc1ccc(Br)cc1)C(F)(F)F to produce O=C(NCCc1ccc(Br)cc1[N+](=O)[O-])C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.