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, H-1, C-13, 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)