This invention relates to new carboxylic acid derivatives of the formula:
wherein R¹ is hydrogen, lower alkyl or aryl, and pharmaceutically acceptable salt thereof which inhibit activity of DHP-I, to a process for preparing them and to an antibacterial composition comprising them and carbapenem antibiotics.
本发明涉及可抑制
DHP-I 活性的式中 R¹ 为氢、低级烷基或芳基的新
羧酸衍
生物及其药学上可接受的盐、制备它们的工艺以及由它们和碳青霉烯类抗生素组成的抗菌组合物。