| abstract |
PURPOSE: To readily and unexpensively obtain an isoflavone derivative useful as a medicament in a great amount, by bringing an extract solution of soybeans into contact with a synthetic adsorbent resin, followed by elution with an organic solvent, etc. n CONSTITUTION: An extract solution of soybeans a it is or after distilling a solvent off is brought into contact with a synthetic adsorbent resin to adsorb an isoflavone derivative. Then the compound is eluted from the synthetic resin with an organic solvent (preferably ethanol) or a mixed solvent of the organic solvent with water to obtain the aimed isoflavone derivative expressed by the formula. n COPYRIGHT: (C)1987,JPO&Japio |