狗舌草

狗舌草总生物碱LD（50）测定通过改良寇氏法、腹腔注射给药测定总生物碱对KM雌性小鼠的LD（50）。

LD50 Determination of Alkaloids from I Kirilowii The LD50 of total alkaloids was determined using female KM mice by intraperitoneal injection according to improved Karber 's method .

结果：从狗舌草总碱中分离到3个苯丙酸类单体化合物（A4、B1和C1）。

The results showed that three phenylpropanoids ( A4 , B1 and C1 ) in total alkaloids from T. kirilowii were isolated .

结果：狗舌草总生物碱LD（50）值为74.52±6.08mg/kg（KM小鼠，ip），95%可信限为68.69～80.85mg/kg。

The results showed that the LDso of total alkaloids was 74.52 + 6.08mg/kg ( mice , ip ) with 95 % confidence limit of 68.69 ~ 80.85mg/kg .

狗舌草生物碱的分离、纯化与鉴定通过柱层析、制备性TLC及重结晶法，对狗舌草生物碱进行分离、纯化，通过MS、IR和NMR对分离到的单体化合物进行结构鉴定。

Isolation , purification and determination of the alkaloids from T. kirilowii The alkaloids from T. kirilowii were isolated and purified by column chromatography , preparative TLC and recrystallization , and the isolated compounds were determined structurally by MS , IR and NMR .

大型红色和黑色的欧洲蛾子；幼虫吃千里光属植物的叶子；为控制千里光（狗舌草）而引入美国。

Large red-and-black European moth ; larvae feed on leaves of ragwort ; introduced into United States to control ragwort .

结果：通过冷浸法，狗舌草总碱提取率为0.067%；通过热回流法，总碱提取率为0.126%。

Results showed that the extraction rate of total alkaloids by cold and hot methanol was 0.067 % and 0.126 % respectively . The alkaloids from T.

狗舌草热回流浸膏的得率明显高于冷浸法，但其总黄酮得率却低于冷浸法。

Kirilowii . The extraction rate of gum from the hot methanol method was higher than the cool leach method , but the content of the total flavonoids was lower .