Two New Flavones from the Seeds of Arctium lappa and Their Bioactivity

Two new flavones, 8,4 ′-dimethoxy-6-(2-oxopropyl)-flavone (1) and 8,4 ′-dimethoxy-6-(3-hydroxypropyl)- flavone (2), were isolated from the seeds of Arctium lappa. Their structures were elucidated by spectroscopic methods, including extensive 1D and 2D NMR techniques. Compounds1 and2 were evaluated for their anti-methicillin-resistant Staphylococcus aureus (anti-MRSA) activity. The results showed that compounds1 and2 exhibited weak active with diameter of inhibition zone (IZD) 10.8 ± 1.0 and 9.3 ± 0.8 mm, respectively. Compounds1 and2 were also tested for antioxidant activity, and they show good antioxidant activity with IC50 values of 3.85 and 3.47 μg/mL, respectively.
Source: Chemistry of Natural Compounds - Category: Chemistry Source Type: research