Tokunosuke Sawada

Isolation and characterization of euglobals from eucalyptus globulus labill. by preparative reversed-phase liquid chromatography

Abstract The isolation of eleven novel acetogenin mevalonates, which have strong granulation-inhibiting activity, from Eucalyptus globulus Labill. is reported. These eleven compounds, which have closely related structures, were successfully isolated with a preparative reversed-phase column using acetonitrile or methanol as the eluent.

The structure of prosapogenin obtained from the saponin of Gleditsia japonica

Abstract Prosapogenin was obtained by alkaline hydrolysis of Gleditsia saponin GS-C (echinoeystic acid 3, 28-O-bisdesmoside), a new triterpenoid saponin isolated from Gleditsia japoinica. Prosapogenin was shown on the basis of chemical and physicochemical data to be echinocystic acid 3-O-β- d -xylopyranosyl-(1–2)-α- l -arabinopyranosyl-(1–6)-β- d -glucopyranoside.