Hydroxychavicol is a phenylpropanoid compound present in leaves of Piper betle. It is a more potent inhibitor of xanthine oxidase (IC50=16.7 μM) than allopurinol.
The compounds of every Wikipedia article carrying a Chembox or a Drugbox, refreshed daily, with the values their infoboxes give. The pages need JavaScript; the API does not.