Scoparone, a natural product isolated and purified from the herbs of Artemisia scoparia, with antifungal, antianginal, antioxidant, immunosuppression and vasorelaxation effects, protects against carbon tetrachloride-induced liver injury, is a very efficient inhibitor of ultraviolet radiation -induced lipid peroxidation and damage, and a phytoalexin associated with resistance of citrus to Phytophthora citrophthora.