Abstract Biosynthesis of nanoparticles is the preferred route for fabrication biocompatible and cheaper drugs. In this study, extract major secondary metabolite from Helichrysum aureonitens , 3,5-dihydroxy-6,7,8-trimethoxyflavone, were used to synthesize silver zinc oxide nanoparticles. Spectroscopic microscopic techniques confirmed formation The flavone alone showed higher DPPH radical scaveng...

The genus Scutellaria L., Lamiaceae family, Scutellarioideae sub-family is known as the most important medicinal plant in world. This research aimed to investigate flavonoid content of seven species from center, southwest, and west Iran. Via thin layer column chromatography, was extracted leaves then purified. To screen compositions, a chromatographic method applied by liquid chromatography mas...

The known flavonoid chrysin-7-O-(beta-D-glycopyranoside) (chrysin glucoside,1) as a major fraction and a new glycoside flavone, chrysin-7-O-beta-D-[(6"-acetyl)glycopyranoside] (2) were isolated from the flowers and leaves of Calycotome Villosa Subsp. Intermedia, They were identified by UV-Vis, 1R, (1)H-, (13)C-NMR and ESI-MS.

Halophila johnsonii Eiseman is a shallow-water marine angiosperm which contains UV-absorbing metabolites. Studies on methanol extracts of H. johnsonii by means of HPLC-UV, NMR, HPLC-MS resulted in isolation and identification of seven previously unknown flavone glycosides: 5,6,7,3',4',5'-hexahydroxyflavone-7-O-beta-glucopyranoside (1), 5,6,7,3',4',5'-hexahydroxyflavone-7-O-(6''-O-acetyl)-beta-g...

Saponarin, apigenin 6-C- and 7-O-bis-β-D-glucoside, was synthesized in an overall yield of 37% via 11 steps, which included the C-glycosylation of 2,4-O-dibenzylphloroacetophenone, the introduction of a cinnamoyl residue by aldol condensation, the formation of a flavone by regioselective deprotection, and oxidative ring-closure to the final regioselective deprotection and stereoselective O-glyc...

In the present work, methanolic extract from the leaves of Rauwolfia serpentina were analyzed phytochemically for the presence of flavonoids. Phytochemical studies revealed the presence of flavonoidal structure, by using chromatographic and spectroscopic techniques, 3,5,7,4’tetrahydroxy flavone i.e., Kaempherol is identified. Antioxidant potential was determined by DPPH method.