title: Studies on semi-synthetic 7 alpha-formamidocephalosporins. I. Structure-activity relationships in some semi-synthetic 7 alpha-formamidocephalosporins.
mesh_terms: D002511:Cephalosporins / Q000138:chemical synthesis* / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D002511:Cephalosporins