Extracts of Ginkgo biloba and their methods of preparation

Details Extracts of Ginkgo biloba and their methods of preparation Extracts of Ginkgo biloba and their methods of preparation

1995-05-22

1997-06-10

Tsang, Cecilia J.

Drug, bio-affecting and body treating compositions

Antigen, epitope, or other immunospecific immunoeffector

Conjugate or complex

514 12, A61K 3170, A61K 31685

Patent

active

056373023

ABSTRACT:
A process is provided for producing a purified extract from Ginkgo biloba leaves by solvent extraction with selected solvents. In the process, a crude or partially purified extract is subjected to solvent extraction with a solvent comprising toluene and n-butanol. Pharmaceutical. compositions comprising dimeric flavones and/or polyphenols are also described.

REFERENCES:
patent: 4571407 (1986-02-01), Chatterjee et al.
patent: 4886904 (1989-12-01), Tanaka et al.
patent: 5043323 (1991-08-01), Bombardelli et al.

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