Quercetin rutin isoquercetin and icariin own same core structure from flavone
the numbers of free phenolic hydroxyl groups for them are 5 4 4 and 1.
This indicated that the cyclization of the oxygen atom at C-7 to form the pyran ring increases the cytotoxic activity of the flavone
. Compound 2 was the most potent cytotoxic agent against HeLa cells with an [IC.sub.50] 0.079 [micro]M.
As to bioactive ingredients, the both of yellow ginger and hoantchy root comprised flavones
, the property of which can increase the concentration of HDL (high-density lipoprotein) (Wei et al., 2008).
The two new prenylated flavones
, together with the four known flavonoids displayed a promising cytotoxic effect on liver metasttatic murine colon 26-L5 carcinoma cells with an ED50 value between 10-90 mg/mL .
Equimolar mixture of 3-([omega]-bromoalkoxy)-substituted flavone
and substituted aniline/2-aminopyridine were refluxed in ethanol (100 mL) for 10-12 h.
and flavonols at dietary levels inhibit a transformation of aryl hydrocarbon receptor induced by dioxin," Febs Lett.
One of the 6 major subgroups of flavenoids is the subgroup of Flavone
including Flavon, Apigenin and Luteolin, which all three exist in chamomile.
6 TANGERINE PEEL Compounds found in citrus fruit peels - called polymethoxylated flavones
(PMFs) - can lower cholesterol.
His work has mainly focused on polymethoxylated flavones
, or PMFs, which typically occur at very high concentrations in orange oil, especially in residues left behind after orange-oil processing.
In Phytochemicals, it was good to find more chemical structures than most texts provide, to help us steer though the flavonols, flavanols, flavones
, flavonones, isoflavones, etc.
Analysis of structural requirements for Ah receptor antagonist activity: ellipticines, flavones
, and related compounds.