ginko biloba leaves extract

摘要

PCT No. PCT/IE96/00034 Sec. 371 Date Jan. 15, 1998 Sec. 102(e) Date Jan. 15, 1998 PCT Filed May 31, 1996 PCT Pub. No. WO96/38160 PCT Pub. Date Dec. 5, 1996An extract from Ginkgo biloba is prepared by separating a lipid fraction, mixing with an alcohol, extracting the alcoholic solution with an organic solvent to remove neutral lipids, and the alcoholic solution is dissolved in a solvent and applied to a chromatographic column. A number of extracting media are applied to the chromatographic column to extract various fractions. The particular fractions of interest for incorporation into topical compositions have characteristics of cerebrosides or digalactosyldiglycerides.