申请人:Glaxo Laboratories Limited
公开号:US04209616A1
公开(公告)日:1980-06-24
The invention provides novel antibiotic compounds which are 7.beta.-acylamidoceph-3-em-4-carboxylic acids, and non-toxic derivatives thereof, and 6.beta.-acylamidopenam-3-carboxylic acids, and non-toxic derivatives thereof, characterized in that the acylamido group has the structure ##STR1## where R is a hydrogen atom or an organic group and R.sup.a is a hydrogen atom or an acyl group. The compounds are syn isomers or exist as mixtures containing at least 75% of the syn isomer. These antibiotic compounds possess high antibacterial activity against a range of gram positive and gram negative organisms coupled with particularly high stability to .beta.-lactamases produced by various gram negative organisms. The invention is also concerned with the administration of the compounds.
本发明提供了新的抗生素化合物,它们是7-β-酰胺基头孢-3-酰基-4-羧酸和其非毒性衍生物,以及6-β-酰胺基青霉烷-3-羧酸和其非毒性衍生物,其特征在于酰胺基具有以下结构:##STR1## 其中R是氢原子或有机基团,R.sup.a是氢原子或酰基。这些化合物是同构体或存在至少75%同构体的混合物。这些抗生素化合物对一系列革兰氏阳性和革兰氏阴性微生物具有高度的抗菌活性,并具有特别高的稳定性,能够抵抗各种革兰氏阴性微生物产生的β-内酰胺酶。本发明还涉及该化合物的使用。