Three cyclonerane sesquiterpenoids, including the known cyclonerodiol (), together with its new derivatives, (10)-12-acetoxy-10-cycloneren-3,7 -diol () and 12-acetoxycycloneran-3,7-diol () were isolated from the cultures of marine-sediment-derived fungus P1-4. The structures of the new compounds ( and ) were elucidated based on extensive spectroscopic methods (1D/2D NMR and HR-MS) and optical rotation analysis.
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