Rutin, a natural citrus bioflavonoid, is extracted from the dry buds of sophora japonical. It is a phenolic antioxidant and has been demonstrated to scavenge superoxide radicals. Rutin is classified as vitamin P, which increase the strength of the walls of the blood capillaries and regulates their permeability.

芦丁是一种天然的柑橘类生物类黄酮，是从苦楝的干燥芽中提取的。它是一种酚类抗氧化剂，已被证明可以清除超氧自由基。芦丁被分类为维生素P，增加血液毛细血管壁的强度并调节其渗透性。