The present invention relates to a 1,8-naphthyridine derivative of the formula ##STR1## wherein X is a fluorine or chlorine atom, and R is a hydrogen atom, or a methyl or ethyl group; and esters thereof and salts thereof are processes for preparation thereof. These compounds show excellent anti-bacterial activity and are useful antibacterial agents.
本发明涉及一种
1,8-萘啶衍
生物,其
化学式为##STR1##其中X是
氟或
氯原子,R是氢原子,或甲基或乙基基团;以及其酯和盐的制备方法。这些化合物表现出优异的抗菌活性,是有用的抗菌剂。