Patents Assigned to Sichuan Xieli Pharmaceutical Co., Ltd.
  • Method for producing camptothecin derivatives
    Patent number: 8299251
    Abstract: The invention offers a method of hydrogenating camptothecin in inert solvent in the presence of nickel catalyst, whereby selective hydrogenation of camptothecin can be very efficiently accomplished using the low-cost catalyst.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: October 30, 2012
    Assignees: Sichuan Xieli Pharmaceutical Co., Ltd., MicroBiopharm Japan Co., Ltd.
    Inventors: Asako Toyoda, Hazuki Nagai, George Ng'ang'a Wanyoike
  • METHOD FOR PRODUCING CAMPTOTHECIN DERIVATIVES
    Publication number: 20110112298
    Abstract: The invention offers a method of hydrogenating camptothecin in inert solvent in the presence of nickel catalyst, whereby selective hydrogenation of camptothecin can be very efficiently accomplished using the low-cost catalyst.
    Type: Application
    Filed: May 22, 2009
    Publication date: May 12, 2011
    Applicants: MERCIAN CORPORATION, SICHUAN XIELI PHARMACEUTICAL CO., LTD.
    Inventors: Asako Toyoda, Hazuki Nagai, George Wanyoike