Patents by Inventor Shunshuke Ito

Shunshuke Ito 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).

  • Glycyrrhetic acid derivatives and use thereof
    Patent number: 4871740
    Abstract: A glycyrrhetic acid derivative of the formula ##STR1## wherein X and Y are hydrogen atom, respectively or X is oxygen atom together with Y, A.sub.1 is methylene or carbonyl radical, A.sub.2 is hydrogen atom, cyano, carbamoyl, carboxyl radical or alkoxycarbonyl group, m and n are an integer, respectively, R.sub.1 is a radical of ##STR2## in which R.sub.2 is an alkyl, alkenyl group, phenyl radical or a substituted phenyl radical, A.sub.3 is S, O or NH, and l is an integer, a process for the preparation of the derivatives, and use of the derivative as a pharmaceutical agent.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: October 3, 1989
    Assignee: Sanwa Kagaku Kenkyusho Co., Ltd.
    Inventors: Masayasu Kurono, Ryoichi Unno, Hiromoto Kimura, Mitsuru Oka, Keiko Hasegawa, Shinichi Ikeda, Noboru Kuboyama, Takashi Ito, Kiichi Sawai, Shunshuke Ito