Novel quinolinecarboxylic derivatives of the formula: ##STR1## wherein Z is ##STR2## in which R.sup.1 is hydrogen atom or a lower alkyl, R.sup.2 is hydrogen atom, hydroxyl or a lower alkyl and R.sup.3 is hydrogen atom, hydroxyl or an amino, and a pharmaceutical salt thereof have excellent antibacterial activities and are useful as an antibacterial agent.
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羧酸衍
生物具有如下结构式:##STR1## 其中Z为##STR2## 其中R.sup.1为氢原子或较低的烷基,R.sup.2为氢原子、羟基或较低的烷基,R.sup.3为氢原子、羟基或
氨基,以及其药物盐具有出色的抗菌活性,并可用作抗菌剂。