title: THE USE OF SUBSTITUENT CONSTANTS IN THE ANALYSIS OF THE STRUCTURE--ACTIVITY RELATIONSHIP IN PENICILLIN DERIVATIVES.
mesh_terms: D002626:Chemistry, Pharmaceutical; D051379:Mice; D010406:Penicillins; D010600:Pharmacology; D012106:Research; D013203:Staphylococcal Infections; D013210:Staphylococcus; D013329:Structure-Activity Relationship
chemical_list: D010406:Penicillins
keywords: CHEMISTRY, PHARMACEUTICAL; EXPERIMENTAL LAB STUDY; MICE; PENICILLIN; PHARMACOLOGY; STAPHYLOCOCCAL INFECTIONS; STAPHYLOCOCCUS