Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Conjugate or complex
Patent
1997-04-01
1999-07-27
Dees, Jose' G.
Drug, bio-affecting and body treating compositions
Antigen, epitope, or other immunospecific immunoeffector
Conjugate or complex
424 58, 424 59, 424 7802, 424 7803, 424489, 514456, A61K 3578
Patent
active
059286466
ABSTRACT:
A process for extracting essentially oligomeric catechin polyphenols from a potentilla plant, including the steps: treating at least part of the plant with a polar organic solvent to form a first extract, evaporating the first extract to dryness at a temperature of not more than 60.degree. C. to form an evaporation residue, adding water to the evaporation residue to form an aqueous solution, exhaustively extracting the solution with a water-immiscible solvent capable of dissolving oligomeric catechin polyphenols to form an organic solution, evaporating the organic solution to dryness at a temperature of not more than 60.degree. C. to form a second extract of essentially oligomeric catechin polyphenols. The second extract can be used as a compound having a free radical-scavenging action and/or action against UV rays.
REFERENCES:
patent: 4698360 (1987-10-01), Masquelier
patent: 5043323 (1991-08-01), Bombardelli et al.
patent: 5248503 (1993-09-01), Emanuel-King
Berkem
Dees Jos,e G.
Shelborne Kathryne E.
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