Compounds having antibiotic activity, processes for their preparation, pharmaceutical compositions containing them and their use as medicaments

摘要

New antibacterial compounds, DC-45-A1 and DC-45-A2 are produced by fermentation of a microorganism belonging to the genus Streptomyces. The antibiotics are accumulated in the culture liquor and are isolated therefrom. These compounds are also prepared by acid hydrolysis of known compounds, DC-45-A or DC-45-B2. DC-45-A2 is also prepared by acid hydrolysis of DC-45-A1.