Abstract:From the whole plant of Rabdosia ternifolia (Labiatae) two diterpeno-ids were isolated. One of them is a new tetracyclic diterpenoids named ternifolin. Bymeans of spectral methods combined wish chemical conversion ternifolin is assigned as6-acetylsodoponin (Ⅲ). The other one is identified as sodoponin (Ⅰ).