title: [Research on a series of heterocyclic compounds with nitrogen: new semi-synthetic penicillin of the quinoxaline class. I].
mesh_terms: D001419:Bacteria / Q000187:drug effects*; D008826:Microbial Sensitivity Tests; D010406:Penicillins / Q000138:chemical synthesis / Q000494:pharmacology*; D011810:Quinoxalines / Q000138:chemical synthesis / Q000494:pharmacology
chemical_list: D010406:Penicillins; D011810:Quinoxalines
vernacular_title: Cercetări în seria unor heterocicli cu azot: noi peniciline de semisinteza din clasa chinoxalinei. Nota I