Six fungal metabolites, of which five were new, including one (1) with a dioxa[4.3.3]propellane ring system, were discovered, identified, and structurally elucidated from Neosetophoma sp. (strain MSX50044); these compounds are similar to the bis-tropolone, eupenifeldin. Three of the meroterpenoids are potent cytotoxic agents against breast, ovarian, mesothelioma, and lung cancer cells with nanomolar IC values while not inducing mitochondrial toxicity at 12.5 μM.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6343109PMC
http://dx.doi.org/10.1021/acs.orglett.8b03769DOI Listing

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Six fungal metabolites, of which five were new, including one (1) with a dioxa[4.3.3]propellane ring system, were discovered, identified, and structurally elucidated from Neosetophoma sp.

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