The present invention relates to novel compounds of formula I:or a pharmaceutically acceptable salt thereof, wherein the integers are as defined in the description. The claimed compounds are useful for the treatment of a bacterial infection. Also claimed is a composition comprising a pharmaceutically acceptable carrier and, as active ingredient, a therapeutically effective amount of the claimed compounds, the use of the claimed compounds or compositions for the manufacture of a medicament for the treatment of a bacterial infection and a process for preparing the claimed compounds.本發明涉及新穎的式I化合物：或其藥學上可接受之鹽，其中該等整體係如在說明書中定義。所請化合物用於治療細菌感染。所請亦可為一種組合物，該組合物包括一藥學上可接受之載體以及作為活性成分的、治療有效量的所請化合物，所請化合物或組合物於製造用於治療細菌感染的藥劑之用途，以及製備所請化合物之方法。
