申请人:Dainippon Pharmaceutical Co., Ltd.
公开号:US04649144A1
公开(公告)日:1987-03-10
The present invention relates to a 1,8-naphthyridine derivative of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 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.
本发明涉及一种式为##STR1##的1,8-萘啉衍生物,其中R.sub.1、R.sub.2和R.sub.3相同或不同,每个是氢或具有1至5个碳原子的低级烷基;以及其酯和盐的制备过程。这些化合物表现出优异的抗菌活性,是有用的抗菌剂。