Flavonoids from the Fruits of Silybum marianum

Nine compounds were isolated from the fruits of Silybum marianum and identified as flavonolignans: silybin(1),silychristin(2),2,3-dehydrosilychristin(3),2,3-dehydrosilybin(4);flavonoids: 4'-methoxy taxifolin(5),taxifolin(6),dihydrokaempferol(7),quercetin(8) and phenolic acids: 3,4-dihydroxybenzoic acid(9).Compounds 5,7 and 9 were isolated from this genus for the first time.