Studies on the Constituents of Epimedium. V. Flavonoids of Epimedium grandiflorum MORR. (4)

Two flavonoids, compounds A and B, were isolated from the herb of Epimedium grandiflorum MORR. (Berberidaceae). Their structures were established from their chemical and spectroscopic evidence as 4'-O-methyl-8-γ, γ-dimethylallylkaempferol 3-rhamnosido-7-glucoside and 4'-O-methyl-8-γ, γ-dimethylallylkaempferol 7-glucoside, respectively. It was presumed that compound A is icariin and compound B is icarisid I, and it is propose to correct their chemical structures as above.