Patents Assigned to Tanabe Seiyaku Company, Limited
  • S type 2-substituted hydroxy-2-indolidinylbutyric ester compounds and process for preparation thereof
    Patent number: 6388078
    Abstract: A camptothecin compound of the formula [XVIII]: wherein R4 is a lower alkanoyl group, R5 is an ethyl group, R7 is a —O(CH2)3NH2 group that may be protected by a —COOC(CH3)3 group, and R6, R8 and R9 are a hydrogen.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: May 14, 2002
    Assignee: Tanabe Seiyaku Company, Limited
    Inventors: Takayuki Kawaguchi, Sumihiro Nomura, Kenji Tsujihara