Tannins from Hamamelis virginiana: Identification of Proanthocyanidins and Hamamelitannin Quantification in Leaf, Bark, and Stem Extracts

B. Vennat; H. Pourrat; M. P. Pouget; D. Gross; A. Pourrat

doi:10.1055/s-2006-962499

Planta Medica, Table of Contents

Planta Med 1988; 54(5): 454-457
DOI: 10.1055/s-2006-962499

Papers

Tannins from Hamamelis virginiana: Identification of Proanthocyanidins and Hamamelitannin Quantification in Leaf, Bark, and Stem Extracts

B. Vennat¹ , H. Pourrat² , M. P. Pouget¹ , D. Gross¹ , A. Pourrat¹

¹Laboratoire de Pharmacie Galénique et de Pharmacotechnie, Faculté de Pharmacie, 28 Place Henri-Dunant, F-63001 Clermont-Ferrand Cedex, France.
²Laboratoire de Pharmacognosie et Microbiologie Industrielle, Faculté de Pharmacie, 28 Place Henri-Dunant, F-63001 Clermont-Ferrand Cedex, France.

Abstract

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Abstract

The tannins in leaf, bark, and stem extracts of Hamamelis virginiana were analyzed. Four proanthocyanidins were isolated by HPLC. One was a procyanidin polymer containing only one type of flavanol unit; the other three were polymers of procyanidin and prodelphinidin containing two types of flavanol units. A method of assay of hamamelitannin showed the bark extract to be 31 times richer in hamamelitannin than the leaf extract and 87 times richer than the stem extract.

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