Uji aktivitas penghambatan xantin oksidase ekstrak etanol 80% dari beberapa tanaman famili combretaceae, lauraceae, lythraceae, oxalidaceae, piperaceae, plumbaginaceae, dan smilacaceae = Study activity inhibition of xanthine oxidase ethanol 80% extract by several plants family combretaceae, lauraceae, lythraceae, oxalidaceae, piperaceae, plumbaginaceae, and smilacaceae