Neem bark extracts
    3.
    发明授权
    Neem bark extracts 失效
    楝树皮提取物

    公开(公告)号:US4515785A

    公开(公告)日:1985-05-07

    申请号:US531591

    申请日:1983-09-13

    CPC分类号: A61K36/58

    摘要: Neem bark extracts produced by pre-treating the bark of neem with an organic solvent having a dielectric constant of 10 or lower, for example, benzene or ethyl acetate and subjecting the residue obtained by the pre-treatment to extraction with a hydrophilic organic solvent having a dielectric constant from 15 to 35, for example, methanol or ethanol and recovering the neem bark extracts from the hydrophilic organic extraction solvent.

    摘要翻译: 通过用介电常数为10以下的有机溶剂例如苯或乙酸乙酯预处理楝树皮产生的楝树皮提取物,并将经预处理得到的残余物用亲水性有机溶剂萃取,所述亲水性有机溶剂具有 介电常数为15至35,例如甲醇或乙醇,并从亲水性有机萃取溶剂回收楝树皮提取物。

    Hot-water extracts of neem bark
    6.
    发明授权
    Hot-water extracts of neem bark 失效
    楝树皮热水提取物

    公开(公告)号:US4537774A

    公开(公告)日:1985-08-27

    申请号:US541479

    申请日:1983-10-13

    IPC分类号: A61K36/00 A61K36/58 A61K35/78

    CPC分类号: A61K36/58

    摘要: Hot-water extracts of the neem bark produced by treating the bark of neem with water at a temperature from 0.degree. to 40.degree. C. and subjecting the residue from said pre-extraction treatment to extraction treatment with hot water. Purification of the extract thus produced by means of alcohol precipitation or dialysis gives products of a higher purity. Moreover, treatments prior to the pre-extraction treatment with water at 0.degree.-40.degree. C. with a non-polar organic solvent having a dielectric constant of 10 or lower and a polar organic solvent having a dielectric constant from 15 to 35 yields neem extracts of a further higher purity. The hot-water extracts of the neem bark according to the present invention possess activity against mouse L-5178Y cells and transplanted sarcoma 180 tumors.

    摘要翻译: 通过在0℃至40℃的温度下用水处理楝树皮产生的楝树皮的热水提取物,并将来自所述预萃取处理的残余物用热水进行提取处理。 通过醇沉淀或透析纯化由此产生的提取物,产生更高纯度的产物。 此外,在用0至-40℃的水用介电常数为10或更低的非极性有机溶剂和介电常数为15至35的极性有机溶剂进行预萃取处理之前的处理产生neem 提取物具有更高的纯度。 根据本发明的楝树皮的热水提取物具有针对小鼠L-5178Y细胞和移植肉瘤180肿瘤的活性。