Otsuka Pharmaceutical Company, Limited

Kazuyoshi Nagami

Kazuyuki Nakagawa

Tatsuyoshi Tanaka

Shigeharu Tamada

Michiaki Tominaga

Shuji Teramoto

Fujio Tabusa

Takafumi Fujioka

Tomoichi Shinohara

Kaoru Abe

Kenji Nakaya

Isao Takemura

Toyoki Mori

Yoshihisa Tanada

Takahito Yamauchi

Hironori Tsutsui

Thiazole derivative

Carbostyril derivatives or salt thereof, including novel compounds, having activities for curing and/or improving arrhythmia. Some carbostyril derivatives having similar chemical structural formula to those of carbostyril derivatives of the present invention are known in the prior art references, however, above-mentioned pharmacological activities have not been known yet.

Carbostyril derivatives and salts thereof and anti-arrhythmic agents

Dihydropyridine derivatives and salts thereof represented by the general formula, ##STR1## which possess excellent calcium antagonist effect, hypotensive effect, platelets aggregation inhibitory effect, phosphodiesterase inhibitory effect, calmodulin inhibitory effect and peroxidized lipid lowering effect, and thus dihydropyridine derivatives and salts thereof are useful as a coronary blood flow improving agent such as coronary vasodilator, hypotensive agent, prophylaxis and treating agents for thrombosis, phosphodiesterase inhibitory agent, peroxidized lipid metabolism lowering agent, anti-inflammatory agent and others.

Dihydropyridine derivatives and process for preparing the same

Dihydropyridine derivatives and salts thereof represented by the general formula, ##STR1## which possess excellent calcium antagonist effect, hypotensive effect, platelets aggregation inhibitory effect, phosphodiesterase inhibitory effect, calmodulin inhibitory effect and peroxidized lipid lowering effect, and thus dihydropyridine derivatives and salts thereof are useful as a coronary blood flow improving agent such as coronary vasodilator, hypotensive agent, prophylaxis and treating agents for thrombosis, phophodiesterase inhibitory agent, peroxidized lipid metabolism lowering agent, anti-inflammatory agent and others.

Novel dihydropyridine derivatives

A carbostyril compound of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are as defined or its pharmaceutically acceptable salt, composition containing the compound and processes for preparing the same are disclosed. The compound is useful as a cardiotonic agent.

Carbostyril compounds, compositions containing same and processes for

Carbostyril derivative or a pharmaceutically acceptable acid addition salt thereof, having excellent platelate aggregation inhibitory effect, calcium antagonism, hypotensive effect and phosphodiesterase inhibitory effect are useful as prophylactic or treating agents for thrombosis, circulation improving agents for coronary blood flow such as coronary vasodilators, hypotensive agents and phosphodiesterase inhibitors. Furthermore, the carbostyril derivatives are weak in heart rate increasing activity and also in cardiac muscle contraction increasing activity, and the carbostyril derivatives are useful agents for curing and treating heart diseases such as cardiac angina and myocardial infarction caused by hypercoagulability of the platelets. Processes are disclosed for preparation of the carbostyril derivatives.

Carbostyril derivative

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Tokushima, Japan

Kazuyoshi Nagami