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Cardenolides and ${\beta}$-Sitosterol Glucoside from Pergularia tomentosa L.
The aerial parts of Pergularia tomentosa L. afforded three cardenolides, desglucouzarin, coroglaucigenin and uzarigenin, in addition to β-sitosterol glucoside. The isolated compounds were identifiedExpand
Selection and micropropagation of high artemisinin producing clones of Artemisia annua L.
Results from unorganized callus cultures initiated from the leaves of the corresponding clones did not indicate the formation of artemisinin or related sesquiterpenes in these cultures. Expand
Antimicrobial and Cytotoxic Activity of the Extracts of Khat Callus Cultures
In the course of the work with khat tissue cultures, the production of dark colored pigments was observed as a typical characteristic of the callus culture, and the present investigation deals with the isolation, identification, and biological effects of such pigments. Expand
Dihydroagarofuran alkaloid and triterpenes from Maytenus heterophylla and Maytenus arbutifolia.
The antimicrobially active EtOH extracts of Maytenus heterophylla yielded a new dihydroagarofuran alkaloid and beta-amyrin, maytenfolic acid showed moderate antimicrobial activity by inhibiting the growth of Candida albicans, Cryptococcus neoformans, Staphylococcus aureus and Pseudomonas aeruginosa. Expand
Bioguided isolation of pentacyclic triterpenes from the leaves of Alstonia scholaris (Linn.) R. Br. growing in Egypt
GLC of unsaponifiable and saponifiable fractions of the hexane extract revealed β-sitosterol (7.37%) and n-tetracosane (54.4%) to be the major sterol and hydrocarbon components, respectively. Expand
Rhombifoline and 5,6-dehydrolupanine fromAnagyrus foetida L.
Rhombifoline and 5,6-dehydrolupanine were isolated for the first time from the leaves and stems ofA. foetida L. indigenous to Saudi Arabia. In addition, five other alkaloids, previously identifiedExpand
Metabolism in vitro of digitoxigenin by rat liver homogenates.
Digitoxigenin is metabolized in vitro by rat liver homogenates and subcellular fractions and the microsomal hydroxylation system can be induced by treatment of the animals with phenobarbital. Expand
Metabolites and some characteristics of the metabolism of 3 H-digoxigenin by rat liver homogenates.
No formation of more polar metabolites was observed, indicating that a microsomal hydroxylating system may not be operative in the metabolism of digoxigenin, and the amount of each metabolite which accumulates depends on the amounts of NADP + added to the incubation mixture. Expand
Investigation of diuretic drug plants. 1. Phytochemical screening and pharmacological evaluation of Anethum graveolens L., Apium graveolens L., Daucus carota L. and Eruca sativa mill
Pharmacological evaluation of the aforementioned plants for diuretic activity has shown the ethanolic extracts of Eruca sativa seeds and fruits of Anethum graveolens, Daucus carota as well as the volatile oils in the former two plants to produce an increase in urine flow in dogs. Expand
Diphenylamine, an antihyperglycemic agent from onion and tea.
Diphenylamine has been isolated as one of the active antihyperglycemic agents of onion and attained the highest percentage in mature onion bulbs; other onion organs contained diphenylamines in lower percentages. Expand