• Korean Journal of Pharmacognosy
• /
• v.29 no.1
• /
• pp.56-59
• /
• 1998

From the n-hexane soluble portion of stem bark of Maackia fauriei, four flavonoids have been isolated and identified as medicarpine, 4',5,7-trihydroxy- 6,8-diprenylisoflavone, osajin and neorautenanol.

• Journal of Applied Biological Chemistry
• /
• v.48 no.4
• /
• pp.193-197
• /
• 2005

Isoflavones 4'-O-methylalpinumisoflavone (1) and 5, 7, 4'-trihydroxy-6,8-diprenylisoflavone (2) were isolated from stem bark of Cudrania tricuspidata (Carr.) Bureau. These compounds were the first reported from this plant. Antioxidant activities 1 and 2 were evaluated by measuring their ability to scavenge DPPH and ABTS radicals. Diprenylisoflavone 2 showed strong scavenging activity against ABTS ($IC_{50}\;=\;16.3\;{\mu}M$), three-fold higher compared to genistein, which do not possess prenylated group which indicates strong scavenging activity against ABTS radical of isoflavone 2 was due to prenyl group.