Asperterpenols A and B, New Sesterterpenoids Isolated from a Mangrove Endophytic Fungus Aspergillus sp. 085242
Organic Letters2013Vol. 15(10), pp. 2522–2525
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Ze’en Xiao, Huarong Huang, Chang‐Lun Shao, Xuekui Xia, Lin Ma, Xishan Huang, Yongjun Lu, Yongcheng Lin, Yuhua Long, Zhigang She
Abstract
Asperterpenol A (1) and asperterpenol B (2), two novel sesterterpenoids with an unusual 5/8/6/6 tetracyclic ring skeleton, were isolated from a mangrove endophytic fungus Aspergillus sp. 085242. The structures were elucidated on the basis of spectroscopic methods and the absolute configurations determined by single-crystal X-ray diffraction analysis. Compounds 1 and 2 inhibit acetylcholinesterase with IC50 values of 2.3 and 3.0 μM, respectively.
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