Patents Assigned to Takara Shuzo Company
  • Cyclopentenone derivative
    Patent number: 6111145
    Abstract: A cyclopentenone derivative represented by the following formula [I] or an optically active substance or a salt thereof. ##STR1## (In the formula, R.sub.1 and R.sub.2 are same or different and each of them is straight or branched alkyl group, straight or branched alkenyl group, aromatic group, aromatic-aliphatic group or H with a proviso that the case where R.sub.1 =R.sub.2 =H, or R.sub.1 =benzyl group and R.sub.2 =H is excluded.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: August 29, 2000
    Assignee: Takara Shuzo Company
    Inventors: Eiji Kobayashi, Nobuto Koyama, Ikunoshin Kato, Kaoru Inami, Tetsuo Shiba