Definition

An orally available concentrated preparation of antitumor B (ATB, Zeng Sheng Ping), a Chinese herbal formula comprised of Sophora tonkinensis, Polygonum bistorta, Prunella vulgaris, Sonchus brachyotus, Dictamnus dasycarpus, and Dioscorea bulbifera, with potential antineoplastic activity. Upon administration, antitumor B key active component-alpha (ATB-KAC-alpha) may, through a not yet fully elucidated mechanism, inhibit tumorigenesis and prevent the development of certain cancers.