A compound of the formula:
wherein R1 stands for n-propyl or isoprppyl; and R2 stands for n-butyl, isobutyl, n-pentyl, n-hexyl or 2-ethylbutyl, or a pharmaceutically acceptable salt thereof, processes for preparing the same and a pharmaceutical composition thereof are provided. The compound can orally be applied as antibiotics having improved bioavailability.
式中的化合物:
其中 R1 代表正丙基或异丙基;R2 代表正丁基、异丁基、正戊基、正己基或 2-乙基丁基,或其药学上可接受的盐,提供了制备该化合物的工艺及其药物组合物。该化合物可作为抗生素口服应用,具有更好的
生物利用度。