Belamcandae Rhizoma Extract is extracted from dry roots of Belamcanda chinensis (L.) DC.. Belamcanda chinensis is mainly used to treat sore throat, bronchitis, and chronic tracheitis. Isoflavonoids, including irigenin, isolated from the rhizome of Belamcanda chinensis have been suggested to possess not only antioxidative and anti-inflammatory, but also antitumor activities.