Three new xanthone derivatives from an algicolous isolate of Aspergillus wentii |
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| Authors: | Ran‐Ran Sun Feng‐Ping Miao Jing Zhang Gang Wang Xiu‐Li Yin Nai‐Yun Ji |
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| Institution: | 1. Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, , Yantai, China;2. University of Chinese Academy of Sciences, , Beijing, China;3. Laishan Forestry Bureau, , Yantai, China |
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| Abstract: | Three new xanthone derivatives, yicathin A (1), yicathin B (2), and yicathin C (3), and three known anthraquinone derivatives, alatinone (4), 1,5‐dihydroxy‐3‐methoxy‐7‐methylanthraquinone (5), and 5‐hydroxy‐1,3‐dimethoxy‐7‐methylanthraquinone (6), were isolated from the cultures of Aspergillus wentii pt‐1, an endophytic fungus isolated from the marine red alga Gymnogongrus flabelliformis. Their structures were unambiguously elucidated by NMR and mass spectroscopic methods as well as quantum chemical calculations. Compound 2 was active against Escherichia coli, and 3 could inhibit E. coli, Staphylococcus aureus, and Colletotrichum lagenarium. Copyright © 2012 John Wiley & Sons, Ltd. |
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| Keywords: | NMR 1 H NMR 13C NMR two‐dimensional NMR yicathin A yicathin B yicathin C Aspergillus wentii |
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