الفهرس 
Introduction
Medicinal and economic valuesOnly 14 pages are availabe for public view
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Abstract
1Preliminary Phytochemical screening of roots of Arnebia hispidissima (Lehm.) DC., revealed the presence of unsaturated sterols and/or triterpenes, carbohydrates and/or glycosides, naphthoquinones, alkaloids and condensed tannins. 2Phytochemical investigation of the petroleum ether extract, nhexane, methylene chloride and ethyl acetate extracts lead to isolation of 9 compounds which characterized using various chromatographic and spectroscopic techniques. The isolated compounds are: Arnebidin: is a new naphthoquinone dimer. It is reported here for the first time from a natural source, Arnebacene: is a new hexahydroanthracene derivative and it is reported here for the first time from a natural source, Arnebin7: is a naphthoquinone compound and was previously identified. It is reported here for the first time from the Egyptian species, Tetracosanyl4hydroxy3methoxytranscinnamate: is a phenyl propanoid ester isolated here for the first time from genus Arnebia Forssk, Vanillic acid: is an aromatic hydroxy acid and reported here for the first time from genus Arnebia Forssk, Mixture of esters of 2ethyl1hexanol, as an aliphatic alcoholic moiety, and linoliec, oleic, lauric, linolenic, capric, myrestic, caprilic, caproic and other unidentified fatty acids, as acid moieties. Esters of this alcohol were isolated and reported here for the first time from the Boraginaceae, mixture of esters of an aliphatic alcohol which need further investigation to establish its structure, and palmitic, linoleic, oleic, lauric, capric and linolenic and other unidentified fatty acids, as acid moieties, a mixture of gbssitosterol and stigmasterol in a ratio of 7:3, a long chain aliphatic alcohol needs further investigation to determine its structure. 3Macromorphological and Micromorphological studies of root, stem, leaf, inflorescence, flowers, fruits and seeds of Arnebia hispidissima (Lehm.) DC. revealed the identification of these organs and their powdered form.