申请人:DAIICHI PHARMACEUTICAL CO., LTD.
公开号:EP0207420A2
公开(公告)日:1987-01-07
This invention provides novel pyridonecarboxyic acid derivatives having a quite high antimicrobial activity. The derivatives have the following formula:
wherein R1, R2 and R3 represent each a hydrogen or C1-C8 alkyl group; R4 represents an ethyl, 2-fluoroethyl, vinyl, isopropyl, isopropenyl or cyclopropyl group; and X represents CH, C-F, C-Cl or N
characterized in that R2 and R3 are not hydrogen at the same time.
本发明提供了具有相当高抗菌活性的新型吡啶羧酸衍生物。这些衍生物具有下式:
其中 R1、R2 和 R3 分别代表氢或 C1-C8 烷基;R4 代表乙基、2-氟乙基、乙烯基、异丙基、异丙烯基或环丙基;X 代表 CH、C-F、C-Cl 或 N。
其特征在于 R2 和 R3 同时不是氢。