Toyama Chemical Co., Ltd.

Hiroyasu Takagi

Satoshi Ono

Kaishu Momonoi

Joji Nakano

Toru Hiraiwa

Isao Watanabe

Katsuyuki Nagumo

Isamu Saikawa

Hirokazu Narita

Yozo Todo

Jun Nitta

Mikako Miyajima

Yoshikazu Fukuoka

Fumihiko Iino

This invention relates to a novel pyridone carboxylic acid derivative having a substituted or unsubstituted cyclopropyl group at the 10-position of pyridobenzoxazine, pyridobenzothiazine or pyridoquinoxaline and a salt thereof, a process for the production thereof and an antibacterial agent comprising the same.

Pyridone carboxylic acid derivatives and salts thereof, process for

This invention relates to a novel 1,4-dihydropyridine derivative of the formula ##STR1## wherein R2 is pyridyl, or a salt thereof. These compounds have a vasodilating activity and a platelet aggregation inhibiting activity. Also disclosed are pharmaceutical compositions containing the same.

Pyridyl ester containing 1,4-dihydropyridine derivatives and salts

This invention relates to a 1,4-dihydropyridine derivative of the formula ##STR1## wherein Y represents an oxygen or sulfur atom or a vinylene group, Z represents an oxygen or sulfur atom or an alkylene group, R.sup.2 represents an imidazolyl or pyridyl group and the remaining substituents are herein defined. These compounds have a vasodilating activity and a platelet aggregation inhibiting activity.

Vasodilating and platelet aggregation inhibiting 1,4 dihydropyridines

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Toyama, Japan

Hiroyasu Takagi