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Carbon-13 NMR studies of flavonoids. III. Naturally occurring flavonoid glycosides and their acylated derivatives
Abstract 13 C NMR spectra for a variety of flavonoid glycosidcs are presented and analysed. Evidence is presented which demonstrates that 13 C NMR spectroscopy is a valuable technique for
Antibacterial activity studies of flavonoids from Salvia palaestina.
Ten aglycones and six glycosides of luteolin and apigenin were identified from the leaves of Salvia palaestina Bentham (Labiatae). Among them cirsimaritin showed a high activity against
The Ultraviolet Spectra of Flavones and Flavonols
The methanol spectra of flavones and flavonols exhibit two major absorption peaks in the region 240 – 400 nm1. These two peaks are commonly referred to as Band I (usually 300 – 380 nm, Table V-1
Ultraviolet-Visible and Proton Magnetic Resonance Spectroscopy of Flavonoids
A number of reviews of ultraviolet and visible absorption spectroscopy have appeared in the past (Jurd, 1962; Mabry et al., 1970; Swain, 1965; Mabry, 1969; Harborne, 1963) the most comprehensive
ChemiCal Constituents of Clove ( Syzygium aromaticum, f am. Myrtaceae) and their antioxidant aCtivity
Sixteen volatile compounds were identified from the n-hexane extract of the buds of Syzygium aromaticum by using gas chromatography-mass spectroscopy (GC-MS). The major components were eugenol (71.56