ANTIBIOTIC DERIVATIVES, DERIVED FROM CEPHALOSPORINS

摘要

entitled: New antibiotic derivatives, derived from cephalo sporins The present invention relates to derivatives of the family of cephalosporins, of formula: < IMG > in which - C=O-OA is an acid, a salt or an ester of this acid, Rl is a group of form < IMG > in which RA-and RB are H or alkyl or form a saturated cyclobutyl or cyclopentyl cycle and RC is H or COOH, R2 is a COOCH2-RD group in which RD is 1, 3-thiazol-4-yl or thiazolium. The invention also relates to a process for preparing the products of formula (I) and to drugs Containing said products.