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Planta Med 1972; 21(4): 374-381
DOI: 10.1055/s-0028-1099567
© Georg Thieme Verlag Stuttgart · New York

TANNINS AND POLYPHENOLICS OF THE GALLS OF TAMARIX APHYLLA – Part II

M. S. Ishak, H. I. El Sissi, A. E. A. El Sherbieny, M. A. M. Nawwar
  • National Research Centre, Dokki, Cairo, Egypt.
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Publication Date:
14 January 2009 (online)

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TANNINS AND POLYPHENOLICS OF THE GALLS OF TAMARIX APHYLLA– Part IPlanta Med 1972; 21(03): 246-253
DOI: 10.1055/s-0028-1099548

Abstract

The ethyl acetate extract of Tamarix aphylla galls was fractionated through extraction with ether into ether–soluble and ether–insoluble portions.

The ether–soluble portion proved to contain isoferulic acid, the flavonol quercetin, its glucoside isoquercitrin, its methyl derivative tamarixetin and ellagic acid, in addition to a new optically inactive polyphenolic component of ellagitannin type.

Free sugars contained in the ether–insoluble portion were isolated and clearly identified by paper chromatography as raffinose, sucrose, glucose, fructose, xylose and ribose.

Some of the polyphenolic and flavonoid components present in the ether–insoluble portion of the ethyl acetate extract were isolated and identified as the optically active corilagin isomer juglanin, gallic acid, dehydrodigallic acid, isoquercitrin, tamarixin and ellagic acid.