Patents by Inventor Koohei Nozawa

Koohei Nozawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 1-Oxo-1,2,3,4-tetrahydro-3-isoquinoline carboxylic acid derivatives
    Patent number: 4537967
    Abstract: The following new isocarbostyryl derivatives represented by the general formula [I]: ##STR1## wherein R.sub.1 is a hydrogen atom or a lower alkyl group, are provided, said derivatives having excellent angiotensin converting enzyme inhibitory activity with expectations therefore being as a hypotensor, and prepared by solvolysis of a compound of the following general formula [II]: ##STR2## wherein R.sub.1 is the same as defined above, R.sub.2 is an acyl group, and R.sub.3 is a hydrogen atom, an alkyl group or an aralkyl group.
    Type: Grant
    Filed: July 1, 1983
    Date of Patent: August 27, 1985
    Assignee: Wakamoto Pharmaceutical Co., Ltd.
    Inventors: Koohei Nozawa, Toyokichi Yoshizawa, Toshio Kuroda