Theogallin, a polyphenol occurring in tea. II.-Identification as a galloylquinic acid
Improved methods are described for the extraction of theogallin from unprocessed tea‐leaf. Gallic and quinic acids have been unequivocally identified as products of hydrolysis. Analytical data indicate theogallin to be a mono‐galloylquinic acid. By analogy with 3‐caffeoylquinic acid, it seems probab...
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| Veröffentlicht in: | Journal of the science of food and agriculture 1958-11, Vol.9 (11), p.701-705 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Improved methods are described for the extraction of theogallin from unprocessed tea‐leaf. Gallic and quinic acids have been unequivocally identified as products of hydrolysis. Analytical data indicate theogallin to be a mono‐galloylquinic acid. By analogy with 3‐caffeoylquinic acid, it seems probable that the galloyl group is attached to the 3‐position of the quinic acid. |
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| ISSN: | 0022-5142 1097-0010 |
| DOI: | 10.1002/jsfa.2740091102 |