A new sesquiterpene isocyanide, 3-oxo-axisonitrile-3 (1), with a spiro [5,6] decane skeleton (spiroaxane) together with a known related sesquiterpene isonitrile (2), sesquiterpene isothiocyanates (3-8) and two diterpene isonitriles (9, 10) have been isolated from the Chinese marine sponge Acanthella
Specimens of the Indo-Pacific sponge Acanthella cavernosa Dendy collected from locations along the Eastern coastline of Australia have been shown to contain a range of sesquiterpenes including isothiocyanate 1, isocyanide 10, and the isocyanates 15 and 22. These metabolite studies have provided a
Five sesquiterpenoids containing isonitrile or isothiocyanate groups were isolated from the sponge Acanthella klethra. Compounds 1 and 2 were identified as axisonitrile 3 and the corresponding isothiocyanate derivative, respectively. Compounds 3-5 were found to be eudesmane sesquiterpenes. None of
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