Metabolic products of microorganisms, 271. Momofulvenone A and B, new benzo[b]fluorene quinones from Streptomyces

  title={Metabolic products of microorganisms, 271. Momofulvenone A and B, new benzo[b]fluorene quinones from Streptomyces},
  author={C Volkmann and Ellen R{\"o}ssner and M. Metzler and Hans Z{\"a}hner and Axel Zeeck},
  journal={Liebigs Annalen},
From the cultures of Streptomyces diastatochromogenes (strain Tu 2895) two novel benzo[b]fluorene quinones, named momofulvenone A (1) and B (2), were isolated. Difficulties in their spectroscopic characterization due to salt effects were overcome by fermentation in the presence of ammonium acetate. The structures were established by a detailed spectroscopic analysis. The polyketide origin of 1 and 2 was verified by feeding [1,2-13C2]acetate to the growing cultures of Tu 2895. The momofulvenones… 
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