Journal
JOURNAL OF NATURAL PRODUCTS
Volume 72, Issue 8, Pages 1492-1496Publisher
AMER CHEMICAL SOC
DOI: 10.1021/np900326a
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Funding
- National Oceanic and Atmospheric Association's National Undersea Research program [NA16RU]
- USDA Agricultural Research Service [58-6408-2-0009]
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Aiming to improve the potency and selectivity of scalarane sesterterpenoids, a series of natural and semisynthetic analogues, derived from the cytotoxic naturally abundant sesterterpene heteronemin (1), were evaluated for their in vitro antimicrobial and cytotoxic properties. The new sesterterpenes 16-O-methylsesterstatin 4 (6c), 17, 24-dihydroheteronemin (7a), 16, 25-deacetoxy-17, 24-dihydroheteronemin (7b), and 16-deacetoxy-25-methoxy-17, 24-dihydroheteronemin (7c) were structurally defined via physical data analyses. Scalarane sesterterpenes possessing an unsaturated 1,4-dialdehyde moiety showed potent inhibitory activity against methicillin-resistant Staphylococcus aureus at concentrations that are not significantly cytotoxic to mammalian cells. The structural features for the cytotoxicity of scalarane sesterterpenoids are discussed.
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