Using CC(=O)Nc1cc(Br)ccc1S(C)(=O)=O, [N-]=[N+]=[N-] to produce Cc1nnnn1-c1cc(Br)ccc1S(C)(=O)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.