Acta Pharmaceutica Sinica B (Dec 2011)

New cyslabdans B and C, potentiators of imipenem activity against methicillin-resistant Staphylococcus aureus produced by Streptomyces sp. K04-0144

  • Nobuhiro Koyama,
  • Yuriko Tokura,
  • Yoko Takahashi,
  • Hiroshi Tomoda

DOI
https://doi.org/10.1016/j.apsb.2011.10.008
Journal volume & issue
Vol. 1, no. 4
pp. 236 – 239

Abstract

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From a further purification study, two new congeners designated cyslabdans B (1) and C (2) were isolated along with previously reported cyslabdan (cyslabdan A (3) in this study) from the culture broth of Streptomyces sp. K04-0144. The structure was elucidated by various spectroscopy including NMR, revealing that 1 and 2 was 18-hydroxy and 1′-methoxy cyslabdan, respectively. Compounds 1 and 2 were found to potentiate imipenem activity against methicillin-resistant Staphylococcus aureus by 123 fold and 533 fold, respectively. Comparison with the activity of compound 3 indicated that the introduction of a hydrophilic group at the dimethyl moiety of the decalin ring was unfavorable for its activity.

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