Pyridonecarboxylic acid derivatives or salts thereof and antibacterial agents containing the same as the active ingredient
申请人:Wakunaga Pharmaceutical Co., Ltd.
公开号:US06211375B1
公开(公告)日:2001-04-03
A novel pyridonecarboxylic acid derivative or its salt exhibiting satisfactory antibacterial activities, intestinal absorption, metabolic stability, and reduced side effects, in particular, phototoxicity and cytotoxicity, as well as an antibacterial agent containing such pyridonecarboxylic acid derivative or its salt are provided.
For such an object, a pyridonecarboxylic acid derivative represented by the following formula (1):
(wherein R1 represents hydrogen atom, a halogen atom or a lower alkyl group; R2 represents hydrogen atom or a lower alkyl group; R3 represents substituted or unsubstituted amino group or hydroxyl group; and R4 represents hydrogen atom, a lower alkyl group, amino group or nitro group) or its salt is provided.
本发明提供了一种新的吡啶酮羧酸衍生物或其盐,该衍生物表现出令人满意的抗菌活性、肠道吸收性、代谢稳定性和减少副作用,特别是光毒性和细胞毒性,以及含有这种吡啶酮羧酸衍生物或其盐的抗菌剂。对于这样的对象,提供了由以下式(1)表示的吡啶酮羧酸衍生物或其盐:(其中R1表示氢原子、卤原子或较低的烷基;R2表示氢原子或较低的烷基;R3表示取代或未取代的氨基或羟基;R4表示氢原子、较低的烷基、氨基或硝基)。