Isolation and identification of (-)-gallocatechin gallate and circular dichroism of green tea flavanols

Isolation and identification of (-)-gallocatechin gallate and circular dichroism of green tea flavanols

Partly raceme (—)‐gallocatechin gallate was isolated from green tea by counter‐current distributins and column chromatography on Sephadex LH‐20. The structure was proven by mass spectroscopy of the pertrimethylsilyl ether and by n.m.r. and circular dichroism (c.d.). The compound is probably an artif...

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Veröffentlicht in:Journal of the science of food and agriculture 1971-09, Vol.22 (9), p.480-484
Hauptverfasser: Wilkins, C. K., de Bruijn, J., Korver, O., Frost, D. J., Weinges, K.
Format: Artikel
Sprache:eng
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Zusammenfassung:Partly raceme (—)‐gallocatechin gallate was isolated from green tea by counter‐current distributins and column chromatography on Sephadex LH‐20. The structure was proven by mass spectroscopy of the pertrimethylsilyl ether and by n.m.r. and circular dichroism (c.d.). The compound is probably an artifact produced by heating (—)‐epigallocatechin gallate. Circular dichroism curves of several tea flavanols are presented.
ISSN:0022-5142
1097-0010
DOI:10.1002/jsfa.2740220913