Compounds of formula (I) and their salts and esters:
wherein X is hydrogen or a group NHR¹, wherein R¹ is hydrogen or an amino protecting group, and R is optionally substituted C₅₋₈ cycloalkyl or cycloalkenyl, are useful in the treatment of bacterial infections.
式(I)化合物及其盐和酯:
其中 X 为氢或基团 NHR¹,R¹ 为氢或
氨基保护基团,R 为任选取代的 C₅₋₈ 环烷基或环烯基,这些化合物可用于治疗细菌感染。