Carasinol B
Carasinol B is a stilbenoid tetramer found in ''Caragana sinica'' (Chinese : Jin Que-gen). Acid-catalyzed epimerization of kobophenol A Kobophenol A is a stilbenoid. It is a tetramer of resveratrol. It can be isolated from '' Caragana chamlagu'',

Tetramer
A tetramer () (''tetra-'', "four" + '' -mer'', "parts") is an oligomer formed from four monomers or subunits. The associated property is called ''tetramery''. An example from inorganic chemistry is titanium methoxide with the empirical formula Ti(OCH3)4, which is tetrameric in solid state and has the molecular formula Ti4(OCH3)16. An example from organic chemistry is kobophenol A, a substance that is formed by combining four molecules of resveratrol. In biochemistry, it similarly refers to a biomolecule formed of four units, that are the same (homotetramer), i.e. as in Concanavalin A or different (heterotetramer), i.e. as in hemoglobin. Hemoglobin has 4 similar sub-units while immunoglobulins have 2 very different sub-units. The different sub-units may have each their own activity, such as binding biotin in avidin tetramers, or have a common biological property, such as the allosteric binding of oxygen in hemoglobin. See also * Cluster chemistry; atomic and molecular clusters ...
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Caragana Sinica
''Caragana sinica'' () is a species belonging to the genus ''Caragana''. ''Caragana sinica'' is known to produce the stilbenoid trimers α-viniferin, showing acetylcholinesterase inhibitory activity, and miyabenol C, a protein kinase C inhibitorNaturally Occurring Protein Kinase C Inhibitors; II. Isolation of Oligomeric Stilbenes from Caragana sinica. Palaniappan Kulanthaivel, William P. Janzen, Lawrence M. Ballas, Jack B. Jiang, Chang-Qi Hu, James W. Darges, Jan C. Seldin, Divann J. Cofield and Laurel M. Adams, Planta Med, 1995, 61(1), pages 41-44, and two stilbene tetramers kobophenol A Kobophenol A is a stilbenoid. It is a tetramer of resveratrol. It can be isolated from '' Caragana chamlagu'',

Kobophenol A
Kobophenol A is a stilbenoid. It is a tetramer of resveratrol. It can be isolated from '' Caragana chamlagu'',(+)-α-Viniferin, a Stilbene Trimer from Caragana chamlague, Inhibits Acetylcholinesterase. Sang Hyun Sung, So Young Kang, Ki Yong Lee, Mi Jung Park, Jeong Hun Kim, Jong Hee Park, Young Chul Kim, Jinwoong Kim and Young Choong Kim, Biological & Pharmaceutical Bulletin, Vol. 25, 2002
from '' Caragana sinica''
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Resveratrol Oligomers
Resveratrol (3,5,4′-trihydroxy-''trans''-stilbene) is a stilbenoid, a type of natural phenol, and a phytoalexin produced by several plants in response to injury or when the plant is under attack by pathogens, such as bacteria or fungi. Sources of resveratrol in food include the skin of grapes, blueberries, raspberries, mulberries, and peanuts. Although commonly used as a dietary supplement and studied in laboratory models of human diseases, there is no high-quality evidence that resveratrol improves lifespan or has a substantial effect on any human disease. Research Resveratrol has been studied for its potential therapeutic use, with little evidence of anti-disease effects or health benefits in humans. Cardiovascular disease There is no evidence of benefit from resveratrol in people who already have heart disease. A 2018 meta-analysis found no effect on systolic or diastolic blood pressure; a sub-analysis revealed a 2 mmHg decrease in systolic pressure only from r ...
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