Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Parasitic organism or component thereof or substance...
Patent
1979-08-22
1981-11-17
Berch, Mark L.
Drug, bio-affecting and body treating compositions
Antigen, epitope, or other immunospecific immunoeffector
Parasitic organism or component thereof or substance...
542437, 2602453, A61K 3144, C07D49804, A61K 3142
Patent
active
043011683
ABSTRACT:
The compounds of the formula (I): ##STR1## and esters thereof wherein R.sub.1 is a lower alkyl group or a phenyl group and R.sub.2 is a hydrogen atom or R.sub.2 together with R.sub.1 represents the residue of a fused benzene ring are .beta.-lactamase inhibitors and anti-bacterial agents. Their preparation and use is described.
Clarke Brian P.
Stirling Irene
Beecham Group Limited
Berch Mark L.
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