Patents Examined by Anton H. Sotto
  • Dipeptide derivative and synthesis and use thereof
    Patent number: 4873342
    Abstract: A novel depeptide derivative which exhibits inhibitory activity against prolyl endopeptidase and is effective for preventing and curing amnesia is disclosed. A process for chemical synthesis of such a derivative, as well as its use, is also disclosed.
    Type: Grant
    Filed: April 16, 1986
    Date of Patent: October 10, 1989
    Assignee: Suntory Limited
    Inventors: Takaharu Tanaka, Masayuki Saitoh, Naoki Higuchi, Masaki Hashimoto