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:
Jun. 15, 1993
Filed:
Oct. 22, 1990
Zaidan Hojim Biseibutsu Dong-A Pharm Co., Seoul, KR;
Kagaku Kenkyukai, Tokyo, JP;
Abstract
A compound of the following formula (I) exhibits an excellent antitumor activity ##STR1## wherein R.sub.1 and R.sub.2 represent hydrogen atom, respectively, or include both straight or branch chain alkylidene group of 1-10 carbon atoms; R.sub.3 represents hydrogen atoms, straight and branch chain alkyl group of 1-10 carbon atoms, straight or branch chain alkyloxycarbonyl group of 1-10 carbon atoms or 3-membered to 6-membered heterocycle containing one nitrogen atom with adjacent alkylene group such as pyrrolidine and N-butoxycarbonyl-pyrrolidine; R.sub.4 and R.sub.5 represent hydrogen atom or alkyl group of 1-5 carbon atoms, respectively; and n represents 0 or an integer of 1-10, or pharmaceutically acceptable salt thereof.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile