The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 1992
Filed:
Jun. 12, 1990
Applicant:
Inventors:
Kenji Sugita, Kobe, JP;
Hiroshi Itazaki, Takarazuka, JP;
Koichi Matsumoto, Toyonaka, JP;
Yoshimi Kawamura, Mino, JP;
Assignee:
Shionogi & Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07K / ;
U.S. Cl.
CPC ...
530321 ; 435 711 ; 930270 ; 930D / ;
Abstract
A cyclic tetrapeptide having the formula (I): ##STR1## wherein n is 4 or 3 and a process for preparing the above cyclic tetrapeptide. The cyclic tetrapeptide of the present invention inhibits transformation of cells caused by oncogenes and possesses activities for recovering to a normal cell and for inhibiting proliferation of carcinoma cells. Therefore, the cyclic tetrapeptide of the present invention is useful for an active ingredient of an antitumor agent.