Cassiaside B2 is an inhibitor of protein tyrosine phosphatase 1B (PTP1B) and human monoamine oxidase A (hMAO-A).Cassiaside B2 is an agonist of the 5-HT2C receptor with anti-allergic activity.Cassiaside B2 is one of the active ingredients in the naphthylpyrone reference extract (NRE).