CEPHALOSPORIN ESTER DERIVATIVES, THEIR PRODUCTION AND USE

摘要

CEPHALOSPORIN ESTER DERIVATIVES, THEIR PRODUCTION AND USE A compound of the formula: < IMG > wherein R1 is a hydrogen atom or a lower alkyl group; R2 is an unsubstituted or lower alkyl-substituted alicyclic alkyl group of 3 to 12 carbon atoms or a C3-6 alicyclic alkyl-substituted lower alkyl group or a pharmaceutically acceptable.salt thereof, processes for preparing the same, and a pharmaceutical composition thereof, are provided. The compound has an improved absorbability and can be orally applied as antibiotics.