title: Studies on antibiotic SF-837, a new antibiotic. IV. Structures of antibiotics SF-837 A 2 , A 3  and A 4 .
mesh_terms: D000606:Amino Sugars; D000900:Anti-Bacterial Agents; D055598:Chemical Phenomena; D002621:Chemistry; D006027:Glycosides; D007259:Infrared Rays; D007783:Lactones; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D013057:Spectrum Analysis
chemical_list: D000606:Amino Sugars; D000900:Anti-Bacterial Agents; D006027:Glycosides; D007783:Lactones