TLC chromatographic conditions were optimized to obtain a system in which the flavones
C-glycosides would be separated in the best manner.
However, defoliated saplings had significantly higher concentrations of total flavone
aglycones and DHPPG and significantly lower concentrations of cinnamic acid derivatives and (+)-catechin than did control saplings (Table 1, [ILLUSTRATION FOR FIGURE 2 OMITTED]).
In conclusion, molecular modifications on the flavone
scaffold placing the amine group on different positions on A ring will be further explored in order to facilitate a cation-[pi] interaction.
Wu, "Late protective effect of pharmacological preconditioning with total flavones
of rhododendra against myocardial ischemia-reperfusion injury," Canadian Journal of Physiology and Pharmacology, vol.
Different groups of mice received 3,3'-dihydroxy flavone
, 6,3'-dihydroxy flavone
, and 5,6-dihydroxy flavone
- i.p in doses of 5, 10, and 20 mg/kg and 3,7-dihydroxy flavone
in doses of 2.5, 5, and 10 mg/kg, 30 min before test.
The UV ([[lambda].sub.max]) spectrum and IR ([cm.sup.-1]) spectrum absorption bands absorption bands of flavone
Twelve 6-oxygenated flavone
sulphates from Lippia nodiflora and L.
The signal in [delta] (43.1 ppm) is assigned to C-3  and the signal in 103.5 ppm is assigned to C-10 of hydroxylated flavones
, which are included in the structure of our compound and confirmed in the [sup.1]H NMR spectrum.
In other words, the range of total concentration was narrower in red plants compared with green plants, which indicated that red plants could withstand a greater environmental impact on flavone
accumulation, which could result in greater uniformity of food quality.
potently stimulates an apical transporter for flavonoids in human intestinal Caco-2 cells," Molecular Nutrition & Food Research, vol.
Synergistic effect of flavones
and flavonols against herpes simplex virus type 1 in cell culture.
to flavonol counterparts apigenin to kaempferol and luteolin to quercetin have one or two hydroxy groups, respectively, in the B ring and were active in all luciferase assays.