Abstract: Salvia przewalskii Maxim. (Labiatae) is widely distributed in the western areas of China, such as Gansu, Sichuan, Yunnan and Tibet provinces. And it has been used as a substitute in Chinese folk medicine for S. miltiorrhiza Bge. (Dan Shen). The mainly chemical constituents of S. przewalskii are diterpenoids and phenolic acids. In our search, isolation and purification were carried out repeatedly by silica gel, Sephadex LH-20, ODS C18 and MCI gel column chromatography. Two new diterpenoids, named ganxintriol A (1) and ganxintriol B (2), and a new monoterpenoid glycoside, named ganxinoside A (3), were obtained from 50% ethanol extract of the roots and rhizomes of S. przewalskii. Their structures were established on the basis of physical methods, chemical methods and spectral data.

Key words: Salvia przewalskii Maxim., Chemical constituent, Ganxintriol A, Ganxintriol B, Ganxinoside A