Plant‐like Cadinane Sesquiterpenes from an Actinobacterial Mangrove Endophyte

Ling Ding*, Helmar Görls, Christian Hertweck

*Corresponding author for this work

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Cadinanes are typical plant sesquiterpenes with a broad range of biological functions. We report the isolation of three cadinanes (1–3 ) from a bacterial endophyte (Streptomyces sp.) of the mangrove plant Bruguiera gymnorrhiza. The structures of two new cadinenens, (+)‐11‐hydroxy‐epicubenol (1 ) and (+)‐12‐hydroxy‐epicubenol (2 ) were elucidated by NMR and mass spectrometry. The bacterial product (+)‐11‐hydroxy‐epicubenol was elucidated to be an enantiomer of the plant product pubinernoid C. (+)‐12‐Hydroxy‐epicubenol was established as a diastereomer of the basidiomycete product trichapargin A. In addition, a crystal structure analysis corroborated the structure and configuration of 5,11‐epoxy‐10‐cadinanol (3 ), a cadinane cycloether initially described as a natural product from liverworth. The discovery of oxygenated cadinanes from a bacterial endophyte may set the basis for the production of cadinanes by bacterial fermentation.
Original languageEnglish
JournalMagnetic Resonance in Chemistry
Issue number1
Pages (from-to)34-42
Number of pages9
Publication statusPublished - 2021


  • NMR
  • 2D NMR
  • Cadinane
  • Endophyte
  • Sesquiterpene
  • Streptomyces
  • Terpene
  • Epicubenol


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