RESUMEN
OBJECTIVE：To optim ize ethanol extraction technology of Mongolian medicine Naru- 3. METHODS ：The L 9（34） orthogonal design was used to optimize ethanol extraction technology of Mongolian medicine Naru- 3 with solid-liquid ratio ，ethanol volume fraction and extraction time as factors ，using comprehensive scores for the contents of benzoylaconitine ，benzoylneoaconitine， benzoylhypoaconitine，aconitine，neoaconitine，hypoaconitine，piperine and gallic acid as indexes. RESULTS ：The optimal ethanol extraction technology was that solid-liquid ratio of 1∶10（g/mL），ethanol volume fraction of 75％，extracting for 1.5 h. After 3 times of validation tests ，average contents of above 8 components in ethanol extract from Naru- 3 were 1.69，1.48，14.69，0.28， 0.05，0.08，26.01，17.33 mg/g（RSDs were 0-4.96％，n＝3），respectively. Average comprehensive score was 19.03（RSD＝1.42％， n＝3）. CONCLUSIONS ：The optimal ethanol extraction technology of Mongolian medicine Naru- 3 is stable and feasible.