2-(2-AMINOTHIAZOL-4-YL)-N-(IMIDAZOLIDIN-2-ON-1-YL)-2-IMINOACETYLAMINOCEPHALOSPORANIC ACIDS IN PURE SYN-FORM,A PROCESS FOR THEIR PRODUCTION AND SYN-ACID USED IN SUCH A PROCESS

摘要

1. Cephalosporins of the general formula III, in syn-configuration and in the crystalline, pure form see diagramm : EP0041655,P12,F1 in which n represents 2 or 3, R**1 represents sodium or, if another part of the molecule contains a positive charge, a negative charge and T denotes -CH2 -O-CO-CH3 , -CH2 -O-CO-NH2 or see diagramm : EP0041655,P12,F2