| 摘要 |
NEW MATERIAL:A comround of the formula (R1 is rhamnose<3-1>xylose, rhamnose<2-1>fucose; R2 is H, glucose; R3 is H, methyl). EXAMPLE:4'-Methoxy-5-hydroxy-8-(3,3-dimethylallyl)flavon 3-0-beta-D-xylopyranosyl(1 3)-4-0-acetyl-alpha-L-rhamnopyranoside-7-0-beta-D-glucoside. USE:A 5-lipoxygenase inhibitor. Useful as an antiallergic drug, antiinflammatory drug, etc. PREPARATION:The stems and leaves of Epimedium koreanum NAKAI are extracted with a solvent such as acetone, and the solvent is removed from the extraction solution. The residue is subjected to a column chromatography, etc., using hexane, etc., as an elution solvent. |
