2297-64-5 Benzenesulfonic acid, 4-bromo-, hydrazide Benzenesulfonic acid, p-bromo-, hydrazide NSC56448 p-Bromobenzenesulfonic acid hydrazide p-Bromobenzenesulfonic hydrazide p-Bromobenzenesulfonylhydrazide p-Bromophenylsulfonylhydrazine