VERFAHREN ZUR HERSTELLUNG VON PFLANZENEXTRAKTEN MIT HOHEM GEHALT AN ISOFLAVONEN

摘要

Production of Trifolium pratense (red clover) extracts (A) containing at least 40 %, by weight isoflavones (IFN), is new. Production of Trifolium pratense (red clover) extracts (A) containing at least 40 %, by weight isoflavones (IFN) involves: (a) extracting the plants with water to give an IFN-free aqueous phase IB and an IFN-enriched residue IA; (b) extracting IA with methanol and removing the methanol to give a residue II containing at least 10 %, by weight IFN; (c) extracting II with acetone and/or 2-5C aliphatic alcohol(s) and removing the solvent to give a residue III containing at least 30 %, by weight IFN; and (d) extracting III with ethanol and removing the ethanol to give (A) as a residue IV. ACTIVITY : None given in the source material. MECHANISM OF ACTION : Estrogen.