Author(s): Adil A. Mujwah
Article publication date: 2010-09-01
Vol. 28 No. 3 (yearly), pp. 170-177.
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Keywords
Juniperus procera, isolation, extraction, phenolic compound, flavanone.
Abstract
Flavonoids are one of the most studied classes of polyphenolic phytochemicals, because
of the important qualities associated with their potency, antioxidant qualities and other biological
activities. Juniperus procera has been used in folk medicine for the treatment of a variety of
conditions for many years in the Kingdom of Saudi Arabia. Examination of the butanol extract of
the leaves of Juniperus procera growing in Saudi Arabia, Enemas region led to the isolation of a new
flavonoid using different chromatographic methods (paper, thin layer and column chromatography).
The structure of the isolated flavonoid was elucidated using several analytical tools such as NMR,
1H, 13C, IR, UV, as well as m. p. (melting point). The new flavonoid was identified as: 4H-1-
Benzopyran-4–one-7-[[6-O-(6-deoxy-alpha-L-mannopyranosyl)-beta-D-glucopyranosyl]-deoxy]-
2,3-dihydr-5-hydroxy-2-(3-hydroxy-4–methoxy-phenyl).