Eisai Company, Limited

Koichi Katayama

Seiichi Kobayashi

Mitsuaki Miyamoto

Makoto Okita

Motohiro Soejima

Tatsuya Yoshiuchi

Masayuki Tanaka

Koji Yamada

Makoto Kaino

Yoshinori Sakuma

Katsuhiro Moriya

Kokichi Harada

Keizo Sato

Yukio Nishizawa

Shinya Abe

Isao Yamatsu

Shigeki Hibi

Katsuya Tagami

Yasushi Okamoto

Takashi Yamanaka

Ieharu Hishinuma

Junichi Nagakawa

Kazuo Hirota

Kaname Miyamoto

Hiromitsu Yokohama

Tsutomu Yoshimura

Yasunori Akita

Tohru Horie

Nitrogen-containing tricyclic compounds and drugs containing the same

A phenothiazine, acridan, acridone oxime, acridone hydrazone and dibenzodiazepine derivative represented by formula (I)

A quinone derivative useful in the treatment of hepatic diseases defined by the general formula: ##STR1## where X and Y may be the same or different from each other and are each a hydroxyl group, a group represented by the formula --(--OCH.sub.2 --).sub.n --OR.sup.6, wherein n is 0 or 1 and R.sup.6 is a lower alkyl group, or an acyl group.

Quinone derivatives and pharmacological use

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.

Ouinone derivatives and pharmacological use

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Ibaraki, Japan

Koichi Katayama