A quinoline derivative of the formula ##STR1## wherein Z is an amino group or a halogen atom, and R.sub.1, R.sub.2 and R.sub.3 are the same or different and each represents a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms, and an ester thereof and a salt of the derivative or the ester and processes for preparation thereof. These compounds show excellent antibacterial activity and are useful as antibacterial agents.
一种
喹啉衍
生物的公式为##STR1##其中Z是
氨基或卤素原子,R.sub.1,R.sub.2和R.sub.3相同或不同,每个表示氢原子或具有1至5个碳原子的较低烷基基团,以及其酯和衍
生物或酯的盐以及其制备方法。这些化合物显示出优异的抗菌活性,并可用作抗菌剂。