FLAVONOIDS FROM ASTERISCUS PYGMAEUS (DC.) COSS & DR GROWN IN EGYPT

Glycosylation of luteolin in hydrophilic organic solvents and structure–antioxidant relationships of luteolin glycosides

“…1C). 10,22 Furthermore, the mass spectrum of compounds 5 and 6 showed the ion peaks [M + H] + at m / z 611.1726 and 611.1728, correspondingly (calculated for C 27 H 31 O 16 , 611.1612) (Fig. 1B).…”

“…The 1 H-NMR spectra of compounds 2–4 showed similarities to those of previous reported compounds luteolin 3′- O -β-glucoside, luteolin 4′- O -β-glucoside and luteolin 7- O -β-glucoside. 10,22,23 Therefore, the chemical structure of compound 2 was elucidated as luteolin 3′- O -β-glucoside, 22,23 3 was elucidated as luteolin 4′- O -β-glucoside 23 and 4 was elucidated as luteolin 7- O -β-glucoside (Fig. 1C).…”

“…13 However, further bioactivity study of luteolin glucosides is hampered by its low in planta abundance. [9][10][11][12] Thus, chemical synthesis or biotransformation approach supplies potential alternatives to obtain sufficient luteolin glucosides.…”

“…The biosynthesis of flavonoid- O -glycosides in plants is mainly mediated by glycosyltransferases. 8 Some luteolin O -glycosides have been isolated from various plants, including luteolin 3′- O -glucoside, luteolin 4′- O -glucoside, 9 luteolin 7- O -glucoside, luteolin 7,4′-di- O -glucoside, 10,11 luteolin-7,3′-di- O -glucoside. 12 Among of them, luteolin 4′- O -glucoside and 7- O -glucoside have been confirmed to be cytotoxic activity against NCI-H929, U266, and OPM2 cell lines.…”

Antifungal Activity of Essential Oil from Asteriscus graveolens against Postharvest Phytopathogenic Fungi in Apples

“…In Saharan folk medicine, it has been used as a stomachic, for treating fever, gastrointestinal tract complaints, cephalic pains, bronchitis, and as an antiinflammatory agent [8]. A. graveolens is also used in Morocco for its antimicrobial [9] and hypoglycemic [10] properties. According to Fahmy [8], A. graveolens essential oil has antibacterial activity against Grampositive and Gram-negative bacteria, and also showed antifungal activity against pathogenic fungi, such as Candida albicans and Saccharomyces cerevisiae.…”