| abstract |
The present invention relates to hitherto unknown compounds of the general formula I: <IMAGE> I in which R1 stands for a five- to ten-membered azacycloalkyl or azabicycloalkyl residue attached via the nitrogen atom and optionally being substituted by one or two, the same or different, lower alkyl groups; R2 represents a hydrogen atom or a lower alkyl, aryl, or aralkyl radical; and A represents a radical of a beta -lactamase inhibitor containing a beta -lactam ring as well as a carboxy group, A being connected via the carboxy group. |