title: [Unexpected antibiotic properties of a cephalosporin].
abstract: The presence of an oximino group on the methylene of the (2-aminothiazol 4-yl)-acetyl side chain bound to the 7-amino cephalosporanic acid affords derivatives with syn or anti configuration. Whereas the anti isomers display low antibiotic activities, the syn isomers possess a surprising high efficiency against gram negative bacteria, enhanced a factor of 10 to 100 as compared with the cephalosporins known at the moment.
mesh_terms: D000900:Anti-Bacterial Agents; D002511:Cephalosporins / Q000494:pharmacology*; D013329:Structure-Activity Relationship
chemical_list: D000900:Anti-Bacterial Agents; D002511:Cephalosporins
vernacular_title: Propriétés antibiotiques inattendues dans le domaine des céphalosphorines.