Betulonic Acid (CAS 4481-62-3), also known as Liquidambaric Acid, is a natural triterpenoid compound derived from Liquidambar species. It exhibits potent anti-tumor activity against melanoma, induces cancer cell apoptosis, and inhibits angiogenesis. With high purity (HPLC≥98%) and solubility in DMSO/chloroform, it is widely used in pharmaceutical research and reference standards.