| 摘要 |
A compound having the general formula <IMAGE> wherein, R0 is a hydrogen atom, a nitrogen-containing heterocyclic group, an acyl group or an amino-protective group; Z is S, S->O,O or CH2; R4 is a hydrogen atom, a methoxy group, or a formamide group; R13 is a hydrogen atom, a methyl group, a hydroxyl group, or a halogen atom; A(+) 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.
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