1984 Volume 37 Issue 5 Pages 441-445
The structure of antibiotic A33853, isolated from the culture broth ofStreptomyces sp., NRRL 12068, is reported. The structure was deduced from an X-ray crystallographic study of its tetraacetyl derivative. Tetraacetyl A33853 is unique because it contains an anhydride moiety, an unexpected product from the reaction of A33853 with acetic anhydride and pyridine.