A New Flavonol Glycoside, Epimedin K, from Epimedium koreanum.

Anthocyanins and other flavonoids

“…One of the four reports is of a C-methylflavone derivative: 5,7-dihydroxy-6,8-di-C-methylflavone 7-[6-(3 -hydroxy-3 -methylglutaryl)]glucoside from rhizomes of Matteuccia orientalis. 68 There are five new isoprenylated flavonol glycosides two of which are complex with three sugars and three acyl groups: anhydroicaritin 3-[2 ,6 -diacetylglucosyl(1<3)-4-acetylrhamnoside]-7-glucoside 225 and the corresponding 4 ,6diacetylglucosyl isomer from Epimedium koreanum. 225 Recently, three glycosides of 8-prenylkaempferol (noranhydroicaritin) thought to contain a (1<4) sugar linkage have been reassigned as having a (1<2) linkage.…”

“…68 There are five new isoprenylated flavonol glycosides two of which are complex with three sugars and three acyl groups: anhydroicaritin 3-[2 ,6 -diacetylglucosyl(1<3)-4-acetylrhamnoside]-7-glucoside 225 and the corresponding 4 ,6diacetylglucosyl isomer from Epimedium koreanum. 225 Recently, three glycosides of 8-prenylkaempferol (noranhydroicaritin) thought to contain a (1<4) sugar linkage have been reassigned as having a (1<2) linkage. 230 Thus, baohuoside III, the 3-rhamnosyl(1<4)rhamnoside from Epimedium davidii 231 has been corrected to the 3-rhamnosyl(1<2)rhamnoside, which is identical to 2rhamnosylikarisoside A from E. koreanum.…”