Abstract: From the stem of Olea yunnanensis Hand. -Mazz., an endemic plant of Oleaceae and a folk medicine in Yunnan Province of China, four glycosides were isolated. Three of them were identified as 10-hydroxyligstroside (1), 10-hydroxyoleuropein (2), and (+)-l-acetoxypinoresinol-4′-β-D-glucoside (3). Another one is a new secoiridoidal glucoside named as oleayunnanoside (4), which structure was elvcidated by means of spectroscopic analysis and chemical methods.

Key words: Olea yunnanensis, Secoiridoid, Lignan, Oleayunnanoside