Abstract:A new sweet constituent named strogin was isolated from water extract ofStaurogyne mergunsis leaves. On the basis of spectroscopic analysis (UV, IR, GLC, HANR,13C-NMR, 2D-NMR and MS) and investigations of the derivatives, the structure waselucidated as 3-OOocylopyranosyl-(1→2)-gOglucuronopyranosy1-3g, 21g, 22g, 23, 29pentahydroxyolean-12edne-21v`2, 3, 4O4riacetyl)4whanmoside.