1. Isolation and Structure Elucidation of New Metabolites from the Mariana-Trench-Associated Fungus Aspergillus sp. SY2601
- Author
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Cangzhu Sun, Yura Ha, Xin Liu, Nan Wang, Xiao-Yuan Lian, and Zhizhen Zhang
- Subjects
marine fungus ,Aspergillus sp. SY2601 ,indolyl diketopiperazine ,aspyrone analogue ,putative meroterpenoid ,antimicrobial activity ,Organic chemistry ,QD241-441 - Abstract
Fungi are important resource for the discovery of novel bioactive natural products. This study investigated the metabolites produced by Mariana-Trench-associated fungus Aspergillus sp. SY2601 in EY liquid and rice solid media, resulting in the isolation and structure determination of 28 metabolites, including five new compounds, asperindopiperazines A–C (1–3), 5-methoxy-8,9-dihydroxy-8,9-deoxyaspyrone (21), and 12S-aspertetranone D (26). Structures of the new compounds were elucidated based on extensive NMR spectral analyses, HRESIMS data, optical rotation, ECD, and 13C NMR calculations. The new compound 12S-aspertetranone D (26) exhibited antibacterial activity against both methicillin-resistant Staphylococcus aureus and Escherichia coli with MIC values of 3.75 and 5 μg/mL, respectively.
- Published
- 2024
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