Matrix for sustained-release preparation
    14.
    发明授权
    Matrix for sustained-release preparation 失效
    用于缓释制剂的基质

    公开(公告)号:US5665394A

    公开(公告)日:1997-09-09

    申请号:US723152

    申请日:1996-09-30

    CPC分类号: C08G63/06 A61K9/1647

    摘要: The present invention relates to a matrix for sustained-release preparation comprising an ester formed at a terminal carboxyl group of a straight-chain polyester which essentially consists of an .alpha.-hydroxymonocarboxylic acid. The matrix is stable to light, heat, moisture, coloring etc., and is of low toxicity. The sustained-release preparation produced by using the ester of the present invention offers stable drug release over an extended period of time, ensuring sustained stable effect. Furthermore, the sustained-release preparation does not show excess drug release just after administration.

    摘要翻译: 本发明涉及用于缓释制剂的基质,其包含在直链聚酯的末端羧基上形成的酯,其基本上由α-羟基单羧酸组成。 基质对光,热,水分,着色等均稳定,毒性低。 通过使用本发明的酯制备的缓释制剂在延长的时间内提供稳定的药物释放,确保持续的稳定的效果。 此外,缓释制剂在施用后不显示过量的药物释放。

    Cephalosporin derivatives
    16.
    发明授权
    Cephalosporin derivatives 失效
    头孢菌素衍生物

    公开(公告)号:US4751295A

    公开(公告)日:1988-06-14

    申请号:US920933

    申请日:1986-10-17

    CPC分类号: C07D285/08 C07C45/79

    摘要: 7-[2-(5-Amino-1,2,4-thiadiazol-3-yl)-2-(substituted)-iminoacetamido]-3-[3-(quaternaryammonio)-1-propen-1-yl]-3-cephem-4-carboxylates of the formula ##STR1## in which R.sup.1 and R.sup.2 are defined herein and --.sup..sym. N.tbd.Q is a quaternary ammonio group as defined herein, and salts, solvates, hydrates and esters thereof, are potent antibacterial agents. Processes for their preparation and intermediates in such processes are described.

    摘要翻译: 7- [2-(5-氨基-1,2,4-噻二唑-3-基)-2-(取代的) - 亚氨基乙酰氨基] -3- [3-(季铵)-1-丙烯-1-基] 其中R 1和R 2在本文中定义,并且 - (+)N 3BOND Q是如本文所定义的季铵基,并且其盐,溶剂合物,水合物和酯类的3-头孢烯-4-羧酸酯 是有效的抗菌剂。 描述了其制备方法和中间体在这些方法中的用途。