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Secondary Metabolites from an Algicolous Aspergillus versicolor Strain
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
Natural Products Discovery Group, Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK 73019, USA
* Author to whom correspondence should be addressed.
Received: 29 November 2011; in revised form: 6 January 2012 / Accepted: 6 January 2012 / Published: 16 January 2012
Abstract: Two new compounds, asperversin A (1) and 9ξ-O-2(2,3-dimethylbut-3-enyl)brevianamide Q (2), and nine known compounds, brevianamide K (3), brevianamide M (4), aversin (5), 6,8-di-O-methylnidurufin (6), 6,8-di-O-methylaverufin (7), 6-O-methylaverufin (8), 5α,8α-epidioxyergosta-6,22-dien-3β-ol (9), ergosta-7,22-diene-3β,5α,6β-triol (10), and 6β-methoxyergosta-7,22-diene-3β,5α-diol (11), were obtained from the culture of Aspergillus versicolor, an endophytic fungus isolated from the marine brown alga Sargassum thunbergii. The structures of these compounds were established by spectroscopic techniques. Compounds 4, 7 and 8 exhibited antibacterial activities against Escherichia coli and Staphyloccocus aureus, and 7 also showed lethality against brine shrimp (Artemia salina) with an LC50 value of 0.5 μg/mL.
Keywords: Sargassum thunbergii; Aspergillus versicolor; asperversin A; 9ξ-O-2(2,3-dimethylbut-3-enyl)brevianamide Q
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Miao, F.-P.; Li, X.-D.; Liu, X.-H.; Cichewicz, R.H.; Ji, N.-Y. Secondary Metabolites from an Algicolous Aspergillus versicolor Strain. Mar. Drugs 2012, 10, 131-139.
Miao F-P, Li X-D, Liu X-H, Cichewicz RH, Ji N-Y. Secondary Metabolites from an Algicolous Aspergillus versicolor Strain. Marine Drugs. 2012; 10(1):131-139.
Miao, Feng-Ping; Li, Xiao-Dong; Liu, Xiang-Hong; Cichewicz, Robert H.; Ji, Nai-Yun. 2012. "Secondary Metabolites from an Algicolous Aspergillus versicolor Strain." Mar. Drugs 10, no. 1: 131-139.