Aspergillines A–E, Highly Oxygenated Hexacyclic Indole–Tetrahydrofuran–Tetramic Acid Derivatives from Aspergillus versicolor
Organic Letters2014Vol. 16(19), pp. 5016–5019
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Min Zhou, Ming-Ming Miao, Gang Du, Xiao-Nian Li, Shan-Zhai Shang, Wei Zhao, Zhihua Liu, Guang‐Yu Yang, Chun-Tao Che, Qiu-Fen Hu, Xue-Mei Gao
Abstract
Aspergillines A-E (1-5) are highly oxygenated cyclopiazonic acid (CPA)-derived alkaloids bearing a rigid and sterically congested hexacyclic indole-tetrahydrofuran-tetramate scaffold, isolated from the endophytic fungus Aspergillus vesicolor. Apergillines A-C represent a new subclass of CPA-derived alkaloids, and aspergillines B and E possess a butanoic acid methyl ester moiety. The structures, including absolute configuration, were elucidated by interpretation of the NMR, X-ray crystallographic, and circular dichroism data. All compounds displayed anti-TMV and cytotoxic activities.
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