| 摘要 |
PURPOSE:To obtain the title compound useful as a medicine and healthy food using leaf, stem, pod, etc., which is a waste material as a raw material in good yield by extracting ground part of beans with a lower alcohol or aqueous solution thereof. CONSTITUTION:Ground part of bean, e.g. leaf, stem or pod is extracted with a lower alcohol (e.g. methanol, ethanol, propanol or butanol, preferably 50vol.% aqueous solution of alcohol) or an aqueous solution thereof and the aimed soyasaponin I [3-O-{alpha-L-lamunopyranosyl-(1 2)-beta-D-galactopyranosyl(1 2)-beta-D- glucuronopyranosyl}soyasapogenol B] expressed by the formula is collected from the extract. |
