A compound of the formula:
wherein R1 is amino or a protected amino group,
R2 is lower aliphatic hydrocarbon group which may have suitable substituent(s),
R3 is amino or a protected amino group, and
X is hydrogen or halogen; and pharmaceutically acceptable salts thereof, and processes for its preparation and a pharmaceutical antibacterial composition comprising, as an active ingredient, the above compound in association with a non-toxic, pharmaceutically acceptable carrier or excipient.
式中的化合物
其中 R1 是
氨基或受保护的
氨基、
R2 是低级脂肪族烃基,可具有合适的取代基、
R3 是
氨基或受保护的
氨基,以及
X 是氢或卤素;及其药学上可接受的盐;以及其制备工艺和药物抗菌组合物,其中上述化合物作为活性成分与无毒的药学上可接受的载体或赋形剂结合使用。