METHOD OF PRODUCING OPTICALLY PURE (5R, 6S)-6-/1(R)-HYDROXYETHYL/-2-METHOXY-METHYLPENEM-3-CARBOLIC ACID OR ITS ESTERS OR SALTS WITH ALKALI METALS

摘要

A substantially (/=95%) optically pure (5R,6S,1 min R) penem of formula CHEM and the pharmaceutically acceptable salts and the ester prodrugs thereof, are endowed with antibacterial activity.