title: Synthesis of some new semisynthetic penicillins.
mesh_terms: D000215:Acylation; D000588:Amines; D006016:Glycolates / Q000138:chemical synthesis; D010397:Penicillanic Acid; D010400:Penicillin G / Q000031:analogs & derivatives / Q000138:chemical synthesis; D010406:Penicillins / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D011343:Procaine / Q000031:analogs & derivatives / Q000138:chemical synthesis
chemical_list: D000588:Amines; D006016:Glycolates; D010406:Penicillins; D011343:Procaine; D010397:Penicillanic Acid; D010400:Penicillin G