Abstract
From the dried fruiting bodies of Ganoderma lucidum, 2 new unsaturated lactones, dayaolingzhilactones A and B (1 and 2), and 1 new meroterpenoid, dayaolingzhiol H (3), together with 10 known compounds (4-13), were isolated. Their chemical structures were identified by using spectroscopic data and calculated specific rotation. The inhibitory activities of compounds 1 and 2 toward acetylcholinesterase (AchE) were assessed in vitro with tacrine as the positive control. Both of them exhibited moderate AchE inhibitory activities at the concentration of 50 μM.
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