Osthenol shows antitumor-promoting activity, it also has antifungal and antibacterial activities.Osthenol potently and selectively inhibited recombinant human monoamine oxidase-A (hMAO-A) with an IC50 value of 0.74 μM; it exhibited a highly potent inhibitory activity on 5alpha-reductase type I in LNCaP cells with an IC50 value of 0.1 microg/ml; it also exhibited inhibitory activity on COX-1 with the IC50 value of 64.3 microM. Osthenol is a hydroxycoumarin that is umbelliferone in which the hydrogen at position 8 has been replaced by a prenyl group. It has a role as an antifungal agent and a plant metabolite. It is functionally related to an umbelliferone.