ISOLATION OF AN ANTIBIOTIC S-583-B, RELATED TO RHODOMYCIN A AND B

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From a streptomyces strain identified as Streptomyces purpurascens, an anthracycline antibiotic named S-583-B was isolated together with rhodomycin A and B. The chromophore of the antibiotic S-583-B was proved to be identical or closely similar to β-rhodomycinone, but the sugar moiety was found to consist of several sugar components including an aminosugar found to be rhodosamine.