A family of multicyclic indolosesquiterpenes from a bacterial endophyte

Ling Ding, Armin Maier, Heinz-Herbert Fiebig, Wen-Han Lin, Christian Hertweck

Research output: Contribution to journalJournal articleCommunication


Three novel indolosesquiterpenes, xiamycin B (1b), indosespene (2), and sespenine (3), along with the known xiamycin A (1a) were isolated from the culture broth of Streptomyces sp. HKI0595, a bacterial endophyte of the widespread mangrove tree Kandelia candel. Agar diffusion assays revealed moderate to strong antimicrobial activities against several bacteria, including methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus faecalis, while no cytotoxicity against human tumor cell lines was observed. Together with the previously reported oridamycin, the endophyte metabolites represent the first indolosesquiterpenes isolated from prokaryotes.
Original languageEnglish
JournalOrganic and Biomolecular Chemistry
Issue number11
Pages (from-to)4029-4031
Number of pages3
Publication statusPublished - 2011
Externally publishedYes


  • Chemistry


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