Using Br, NS(=O)(=O)c1ccc(CC(=O)c2ccccc2)cc1 to produce NS(=O)(=O)c1ccc(C(Br)C(=O)c2ccccc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.