Method for obtaining an extract composed mainly of ginkgoflavonoides from ginkgo biloba leaves.

摘要

PROCEDURE FOR OBTAINING AN EXTRACT COMPOUND GINKGOFLAVONOIDES ESSENTIALLY FROM Ginkgo biloba leaves. PROCEDURE Extract of Ginkgo biloba leaves with aqueous solutions of ketones or lower alcohols, Desolventising WITH ORGANIC EXTRACT TO OBTAINING TENDER. This extract is dissolved in a mixture of water with an organic solvent limitedly soluble in water and extracted with organic solvent SAME IN WATER SATURATED. CONCENTRATION OF ORGANIC PHASE LEADS TO EXTRACT Squishy that eventually ELIMINATES lipoid COMPONENTS. EXTRACT MAY EVENTUALLY BE TREATED WITH LESS ALCOHOL, filtered and concentrated. THE SOLUTION AQUEOUS TREATMENT TOGETHER WITH SOLVENT Ammonium Sulphate organic compound a lower alcohol and a lower ketone; LEADING TO AN ORGANIC PHASE CONTAINING THE PRODUCT. THE FINAL DRY ORGANIC by solvent evaporation in GINKGOFLAVONOIDES consists essentially of UN15-40%, 1.5% MAXIMUM CONTENT OF 10% prodelfinidines OF PROANTOACINIDINAS. This extract for therapeutic AND CONTROL OF CEREBRAL CIRCULATION deficit AND COSMETIC PREPARATIONS TOPICAL USED.