The invention provides novel antibiotic compounds which are 6.beta.-acylamidopenam-3-carboxylic acids, and non-toxic derivatives thereof, characterized in that the acylamido group has the structure ##EQU1## WHERE R is a hydrogen atom or an organic group and R.sup.a is an etherifying monovalent organic group linked to the oxygen atom through a carbon atom. The compounds may be either syn or anti isomers or may exist as mixtures e.g. containing at least 75 percent of one isomer. These antibiotic compounds possess high antibacterial activity against a range of gram positive organisms including penicillinase - producing staphylococci coupled with high activity against strains of the gram-negative organism Haemophilus influenzae. The invention is also concerned with the administration of the compounds.
本发明提供了新型抗生素化合物,其为6.beta.-酰胺基青霉烷-3-
羧酸,以及其非毒性衍
生物,其特征在于酰胺基具有以下结构## EQU1 ##其中R是氢原子或有机基团,而R.sup.a是通过碳原子与氧原子连接的醚化一价有机基团。这些化合物可以是同构体或反异构体,也可以存在混合物,例如含有至少75%的一个异构体。这些抗生素化合物对一系列革兰氏阳性菌具有高度的抗菌活性,包括产
青霉素酶的葡萄球菌,并且对革兰氏阴性菌流感嗜血杆菌的菌株也具有高度的活性。本发明还涉及该化合物的给药。