Zhang, "Isolation and purification of four flavone
C-glycosides from antioxidant of bamboo leaves by macroporous resin column chromatography and preparative high-performance liquid chromatography," Food Chemistry, vol.
13C NMR Spectral Assignement of the A-RING of Polyoxygenated flavones
, Phytochimistry, 47: 865-874.
Maysin, a flavone
glycoside from corn silks with antibiotic activity toward corn earworm.
Cooking and processing have little effect on the biological activity of flavones
and isoflavones (63).
We analyzed a total of 34 compounds by HPLC: 3,4[prime]-dihydroxypropiophenone-3-glucoside (DHPPG), (+)-catechin, nine cinnamic acid derivatives, 15 flavonol glycosides, and eight flavone
Among the compounds tested the baicalein derivative 14 was the most active, showing an [IC.sub.50] value of 30.40 [+ or -] 1.28 [micro]M, very similar to the precursor baicalein (13) ([IC.sub.50] = 35.09 [+ or -] 4.13 [micro]M), suggesting that the presence of 8-(dimethylamino)methyl group on the flavone
skeleton did not significantly alter its ability to scavenge free radicals.
Abbreviations TFR: Total flavones
from Rhododendron simsii Planch.
3.7- dihydroxy flavone
, 3,3'-dihydroxy flavone
, 6,3'-dihydroxy flavone
, and 5,6-dihydroxy flavone
(Research Organics - Chennai, India), para chlorophenylalanine (PCPA) (Tokyo Chemical Industries, Japan), alpha-methyl-para-tyrosine (AMPT) (Sigma Aldrich, St.
The UV ([[lambda].sub.max]) spectrum and IR ([cm.sup.-1]) spectrum showed presence of flavone
The UV spectrum (CHCl3) of 1 showed I>>max at 252, 270 and 350 nm indicated the presence of flavone
glycosides and phenolic acids were the only phenolic compounds found in the leaves of Verbenaceae analyzed.
On the contrary, the flavone
sakuranetin (1) does not exhibit the double bond at C-2 and C-3, which in mono- or dihydroxylated flavones
results in the loss of cellular growth inhibitory activity .
Both AG and LT have a flavone
in their chemical structure, and enzymes that work as key biocatalysts to synthesize the core structure of flavonoids such as flavone
, flavonol, flavanone, and anthocyanidin.
Jiaguo et al., "Flavone
ingredients can synergistically inhibit NDV infecting cell and improve ND vaccine's protective rate," International Journal of Biological Macromolecules, vol.
The product used included astragalus polysaccharide (ASP), isatis root polysaccharide (IRP), propolis polysaccharide (PP) and epimedium flavone