title: [257. New beta-lactam antibiotics. The preparation of 8-beta-phenylacetamidohomoceph-4-em-5-carboxylic acid (1). Modifications of antibiotics. 7].
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis*; D001381:Azepines / Q000138:chemical synthesis; D002855:Chromatography, Thin Layer; D009682:Magnetic Resonance Spectroscopy; D009904:Optical Rotation; D010648:Phenylacetates / Q000138:chemical synthesis; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013846:Thiepins / Q000138:chemical synthesis*; D047090:beta-Lactams / Q000138:chemical synthesis
chemical_list: D000900:Anti-Bacterial Agents; D001381:Azepines; D010648:Phenylacetates; D013846:Thiepins; D047090:beta-Lactams
vernacular_title: 257. Neue beta-Lactam-Antibiotika. Uber die Darstellung der 8-beta-Phenylacetamido-homoceph-4-em-5-carbonsäure (1). Modifikationen von Antibiotika. 7.