A 5-amino-8-methyl-7-pyrrolidinylquinoline-3-carboxylic acid derivative represented by the general formula: ##STR1## wherein R.sup.1 is a hydrogen atom or a lower alkyl group; R.sup.2 is a hydrogen atom, a lower alkyl group, a lower alkanoyl group, a halogenated lower alkanoyl group or a residue of carboxylic acid ester; R.sup.3 is a hydrogen atom or a lower alkyl group; R.sup.4, R.sup.5 or R.sup.6 are each independently a hydrogen atom or a lower alkyl group; or two of R.sup.4, R.sup.5 and R.sup.6 may be taken together to form a --(CH.sub.2).sub.n -group wherein n is 1 or 2, a stereoisomer thereof, or a pharmacologically acceptable salt thereof, the process for preparing these compounds, a pharmaceutical composition comprising an effective amount of these compounds and methods for the treatment of infectious diseases through the administration to patients of an effective amount of these compounds, and intermediates of these compounds are disclosed. These compounds are effective as antibacterial agents.
本发明揭示了一种由下式表示的5-
氨基-8-甲基-7-
吡咯烷基
喹啉-3-羧酸衍
生物:##STR1## 其中R.sup.1是氢原子或低碳基;R.sup.2是氢原子,低碳基,低脂肪酰基,卤代低脂肪酰基或
羧酸酯残基;R.sup.3是氢原子或低碳基;R.sup.4,R.sup.5或R.sup.6各自独立地是氢原子或低碳基;或者R.sup.4,R.sup.5和R.sup.6中的两个可以结合形成--(CH.sub.2).sub.n-基团,其中n为1或2,其立体异构体或药理学上可接受的盐,以及制备这些化合物的方法,包括含有这些化合物有效量的药物组合物和通过将这些化合物的有效量用于患者治疗传染病的方法,以及这些化合物的中间体。这些化合物作为抗菌剂非常有效。