| 摘要 |
This invention provides a new method of extraction of the flavonoid lespecapitoside from dried leaves of lespedza capitosa, said method comprising extracting the leaves with methanol, then evaporating the methanolic solution, taking up the residue on water, partitioning the aqueous solution with ethyl acetate evaporating the ethyl acetate solution, taking up the residue in alcohol, and recrystallisation therefrom. The lespecapitoside extracted by this method is purer than and has advantageous properties compared with that previously known. Its use in hypoazotemic and antiatheromatous) pharmaceutical compositions is described. |
