The invention relates to compounds of formula (I)wherein U, V, W, X, R1, R2, R3, R4, R5, R6, A, B, D, E, G, m and n are as defined in the description, to pharmaceutically acceptable salts of such compounds for use in the manufacture of a medicament for the prevention or treatment of a bacterial infection. Certain compounds of formula (I) are new and are also part of this invention.本發明係關於式(I)化合物其中U,V,W,X,R1,R2,R3,R4,R5,R6,A,B,D,E,G,m及n均如說明文中之定義,此種化合物之藥學上可接受鹽,供使用於製造藥劑,以預防或治療細菌感染。某些式(I)化合物係為新穎,且亦為本發明之一部份。