1,7-Dihydroxy-2,3-methylenedioxyxanthone exhibits antiulcerogenic, anti-oxidation, and antihyperalgesic activities and can inhibit carrageenan-induced hyperalgesia.
Onjisaponin F(Polygalasaponin XXXI) acts non-competitively against cyclic AMP phosphodiesterase, like papaverine; it also exhibits a prolongation effect on hexobarbital sleeping time in mice.