Tanabe Seiyaku Company, Limited

Osasi Takaiti

Katsuo Ikezawa

Takeo Iwakuma

Katsuyuki Noguchi

Akira Tsunashima

Masao Wada

Shigeyoshi Saijo

Shoichi Harigaya

Junichi Himizu

A novel carbostyril derivative of the formula: ##STR1## or a pharmaceutically acceptable acid addition salt thereof, and a process for preparing same. The compound (I) shows potent bronchodilating activity and is useful as a bronchodilator.

Bronchodilating

Novel 8-azaprostanoic acid derivatives and processes for preparing the same are disclosed. Said 8-azaprostanoic acid derivatives are shown by the formula: ##STR1## wherein R.sup.1 is hydrogen or alkyl of 2 to 6 carbon atoms, R.sup.2 is hydrogen or methyl and R.sup.3 is hydrogen, or R.sup.1 is methyl when R.sup.2 is hydrogen and R.sup.3 is methyl. They exhibit Prostaglandin-like activities and are useful as bronchodilators, stimulating agents for childbirth, abortion or labor, and/or for the treatment of gastro-intestinal disorders.

8-Azaprostanoic acid derivatives

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Tokyo, Japan

Osasi Takaiti