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De Gruyter, Zeitschrift für Naturforschung C, 9-10(64), p. 637-643, 2009

DOI: 10.1515/znc-2009-9-1006

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3-O-trans-Caffeoylisomyricadiol: A New Triterpenoid from Tamarix nilotica Growing in Saudi Arabia

Journal article published in 2009 by Raha S. Orfali, Sherif S. Ebada ORCID, Azza M. El-Shafae, Areej M. Al-Taweel, Wen H. Lin, Victor Wray, Peter Proksch
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Distributing this paper is prohibited by the publisher

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Abstract

A detailed chemical study of the aerial parts of Tamarix nilotica (Tamaricaceae) from Saudi Arabia led to the isolation of a new pentacyclic triterpenoid, 3-O-trans-caffeoylisomyricadiol, in addition to nine known compounds. The structures of all isolated compounds were unambiguously elucidated by 1D, 2D NMR, and mass spectrometry. In the radical scavenging (DPPH) assay, 3-O-trans-caffeoylisomyricadiol exhibited potent antioxidant activity with an IC50 value of 3.56 μM, while that for quercetin (standard antioxidant) was 5.72 μM