6-Substituted derivatives of clavulanic acid

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...

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2602453, C07D44804, A61K 3142

Patent

active

045713928

ABSTRACT:
The present invention provides the compounds of the formula (II): ##STR1## and salts and esters thereof wherein R.sub.1 is a hydrogen atom or an alkyl group of 1-4 carbon atoms and R.sub.2 is a hydrogen atom or an alkyl group of 1-4 carbon atoms or is joined to R.sub.1 to form part of a 5-, 6- or 7 membered carbocyclic ring. These compounds are .beta.-lactamase inhibitors able to enhance the effectiveness of pencillins and cephalosporins. Their preparation and compositions containing them are described.

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