Abstract
Phytochemical investigation on the EtOAc extract of the aerial parts of Epimedium koreanum led to the isolation of three new acylated prenylflavonol glycosides, korepimeosides A-C (13), together with twenty known ones (423). The structures of three new compounds (13) were established on the basis of chemical and spectroscopic methods as icaritin 3-O-[2,6-O-diacetyl-β-d-glucopyranosyl(13)-4-O-acetyl-α-l-rhamnopyranoside] (1), icaritin 3-O-[3,6-O-diacetyl-β-d-glucopyranosyl(13)-4-O-acetyl-α-l-rhamnopyranoside] (2), and icaritin 3-O-[3,-O-acetyl-β-d-glucopyranosyl(13)-4-O-acetyl-α-l-rhamnopyranoside], 7-O-β-D glucopyranoside (3).
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