The present invention relates to a 1,8-naphthyridine derivative of the formula
wherein R1, R2 and R3 are the same or different and each hydrogen or lower alkyl having 1 to 5 carbon atoms; and esters thereof and salts thereof and processes for preparation thereof. These compounds show excellent antibacterial activity and are useful antibacterial agents.
本发明涉及一种
1,8-萘啶衍
生物,其式中 R1、R2 和 R3 是相同或不同的,每个都是氢或具有 1 至 5 个碳原子的低级烷基;以及其酯和盐及其制备方法。 这些化合物显示出优异的抗菌活性,是有用的抗菌剂。