1970 Volume 23 Issue 3 Pages 155-161
A new antibiotic SF-733 inhibiting both Gram-negative and Gram-positive bacteria was isolated from Streptomyces ribosidificus nov. sp., strain SF-733. Antibiotic SF-733 obtained as colorless needles has a molecular formula C17H34N4O10, and is concluded to be a new aminoglycosidic, water-soluble and basic antibiotic based on its physical and chemical properties.