A compound having the general formula ##STR1## wherein, R.sup.0 is a hydrogen atom, a nitrogen-containing heterocyclic group, an acyl group or an amino-protective group; Z is S, S.fwdarw.O,O or CH.sub.2 ; R.sup.4 is a hydrogen atom, a methoxy group, or a formamide group; R.sup.13 is a hydrogen atom, a methyl group, a hydroxyl group, or a halogen atom; A.sym. is a condensed triazolio group which may be substituted, or a pharmaceutically acceptable salt or ester thereof is novel and has an excellent antibacterial activity.
具有一般式##STR1##的化合物,其中,R.sup.0是氢原子、含氮杂环基团、酰基或
氨基保护基;Z是S、S.fwdarw.O、O或CH.sub.2;R.sup.4是氢原子、甲氧基或甲酰胺基;R.sup.13是氢原子、甲基、羟基或卤素原子;A.sym.是一种紧缩的三唑基团,可以被取代,或其药学上可接受的盐或酯是新颖的,具有优异的抗菌活性。