This disclosure relates to compounds of formula (I) or a pharmaceutically acceptable salt thereof:, in which n, R1, R1’, R2, R3, R4, R4’, and R5-R14are defined in the specification. The compounds of formula (I) can be used to treat bacterial infection.本揭露內容係有關於具化學式(I)的化合物或其一種藥學上可接受的鹽類:, 其中n、R1、R1’、R2、R3、R4、R4’及R5-R14係如說明書所界定。具化學式(I)的化合物可用於治療細菌感染。