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.
一种由通式表示的5-
氨基-8-
甲基-7-
吡咯啉基
喹啉-3-羧酸衍
生物:其中R.sup.1是
氢原子或低
碳基团;R.sup.2是
氢原子、低
碳基团、低
碳酰基团、卤代低
碳酰基团或
羧酸酯的残基;R.sup.3是
氢原子或低
碳基团;R.sup.4、R.sup.5或R.sup.6分别独立地是
氢原子或低
碳基团;或R.sup.4、R.sup.5和R.sup.6中的两个可结合形成一个--(CH.sub.2).sub.n-基团,其中n为1或2,其立体异构体,或其药理学上可接受的盐,揭示了制备这些化合物的方法,包含这些化合物的有效量的药物组合物以及通过向患者给予这些化合物的有效量来治疗传染病的方法,以及这些化合物的
中间体。这些化合物作为抗菌剂是有效的。