Quinolonecarboxylic acid derivatives of the following formula, ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently hydrogen atom or lower alkyl group; the hydrates or the pharmaceutically acceptable acid addition or alkali salts thereof are useful as an antibacterial agent.
以下的喹诺
酮羧酸衍
生物,其
化学式如下:##STR1## 其中,R.sup.1、R.sup.2、R.sup.3和R.sup.4各自独立地为氢原子或低碳基;其
水合物或药学上可接受的酸加成物或碱盐是一种抗菌剂。