An objective of the present invention is to provide carbapenem derivatives which have potent antibiotic activity against MRSA, PRSP, Influenzavirus, and &bgr;-lactamase-producing bacteria and are stable against DHP-1. The compounds according to the present invention are compounds represented by formula (I) or pharmaceutically acceptable salts thereof:
1
wherein R
1
represents H or methyl; R
2
and R
3
each independently represent H, halogen, lower alkyl or the like; R
4
represents optionally substituted lower alkylthio or the like; and R
5
represents optionally substituted lower alkyl or the like.
本发明的目的是提供一种对MRSA、PR
SP、流感病毒和β-内酰胺酶产生的细菌具有强效抗生素活性,并且对
DHP-1稳定的头孢烯类衍
生物。根据本发明,化合物是由式(I)或其药学上可接受的盐所表示的化合物:其中,R1代表氢或甲基;R2和R3分别独立地代表氢、卤素、较低的烷基或类似物;R4代表可选取代的较低烷基
硫醚或类似物;R5代表可选取代的较低烷基或类似物。