Pharmaceutical composition containing oxapenem-3-carboxylic acid

摘要

An oxapenem compound which is, or is capable of forming, a zwitterion of formula wherein R is a CSUB1/SUB-CSUB8 /SUBbranched or straight chain alkyl group which is substituted by a protonated nitrogen base. The compounds find particular use as high bioavailability beta-lactamase inhibitors.