[Isolation and identification of brine shrimp lethal activities from Derris trifoliata].

OBJECTIVE

To study the brine shrimp lethal activities of the roots and stems from Derris trifoliata.

METHODS

The biological activity of the athyl acetate extract was tested by the 2nd-instar of Artemia franciscana by the method of Silica gel column chromatography, Sephadex LH-20 column chromatography, Semipreparative HPLC, and their structures were elucidated by spectral analysis.

RESULTS

Eleven compounds were isolated from the athyl acetate extract, and LD50 s of 12a-hydroxyrotenone, tephrosin, rotenone and deguelin were 0.365, 0.236, 0.060 and 0.734 microg/mL, respectively.

CONCLUSIONS

The results of bioassay show that 12a-hydroxyrotenone, tephrosin,rotenone and deguelin have strong brine shrimp lethal activity.