DDMP-conjugated Saponin (soyasaponinβg) Isolated from American Groundnut (Apios americana)

This is the authors' abstract. We don't add key points for this paper.

A DDMP (2,3-dihydro-2,5-dihydroxy-6-methyl-4H-pyran-4-one)-saponin, named soyasaponin βg, was isolated from rootstock of the American groundnut (Apios americana). The structure was identified by 1H-NMR and 13C-NMR spectroscopy and by chemical techniques. The distribution of this DDMP-saponin in the rootstock was detected as the brown color produced by the reaction with FeCl3. A high concentration of DDMP-saponin was observed around the cells in fibrovascular bundle connecting the stem to plumule.