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. 11, 1993
Filed:
Aug. 31, 1990
Shinya Abe, Ibaraki, JP;
Yasushi Okamoto, Ibaraki, JP;
Katsuya Tagami, Ibaraki, JP;
Shigeki Hibi, Ibaraki, JP;
Junichi Nagakawa, Ibaraki, JP;
Kazuo Hirota, Ibaraki, JP;
Ieharu Hishinuma, Ibaraki, JP;
Kaname Miyamoto, Ibaraki, JP;
Takashi Yamanaka, Ibaraki, JP;
Hiromitsu Yokohama, Ibaraki, JP;
Tsutomu Yoshimura, Ibaraki, JP;
Tohru Horie, Ibaraki, JP;
Yasunori Akita, Ibaraki, JP;
Koichi Katayama, Ibaraki, JP;
Isao Yamatsu, Ibaraki, JP;
Eisai Co., Ltd., Tokyo, JP;
Abstract
A quinone derivative useful in the treatment of hepatic diseases defined by the general formula: ##STR1## where R1 is selected from the group consisting of alkyl, alkenly, alkynyl or heterocycle, R2 is a substituted nitrogen containing radical wherein the substituents on said nitrogen are selected from the group consisting of hydrogen, substituted or unsubstituted lower alkyl or heterocycles, and where said nitrogen may be a ring heteroatom, and R3, R4 and R5, may be the same or different and each are hydrogen, lower alkyl or lower alkoxy groups.