Patents Assigned to Dong Kook Pharmaceutical Company, Ltd.
  • Buprenorphine analgesic analogues
    Patent number: 5849915
    Abstract: The object of this invention is to provide novel buprenorphine analgesic analogues represented by following formula(I) and their non-toxic pharmaceutically acceptable salts. ##STR1## wherein R.sub.1 is hydrogen atom, methyl, ethyl, cyclopropyl or cyclobutyl; andR.sub.2 is cyclopropyl or cyclobutyl.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: December 15, 1998
    Assignee: Dong Kook Pharmaceutical Company, Ltd.
    Inventors: Yong Hae Kim, Jin Kyu Park, Kwon Kim, Hee Sock Park