色酮
代谢物
立体化学
化学
拉伤
真菌
次生代谢物
吲哚试验
曲霉
生物碱
吲哚生物碱
二维核磁共振波谱
微生物学
生物
生物化学
植物
解剖
基因
作者
Zhibo Hu,Haishan Cui,Yan Wang,Cheng Li,Senhua Chen,Zhizeng Gao,Lan Liu,Bo Peng,Jing Li
标识
DOI:10.1016/j.phytochem.2024.114187
摘要
Seven previously undescribed compounds, including four diketomorpholine alkaloids (1‒4), one indole diketopiperazine alkaloid (9), one chromone (10), and one benzoic acid derivative (13), and nine known compounds (5–8, 11, 12, and 14–16) were isolated from two different fungal sources. Nine of these metabolites (1–9) were obtained from a seagrass-derived Aspergillus alabamensis SYSU-6778, while the others were obtained from a mixed culture of A. alabamensis SYSU-6778 and a co-isolated fungus A. fumigatiaffinis SYSU-6786. The chemical structures of the compounds were deduced via spectroscopic techniques (including HRESIMS, 1D and 2D NMR), chemical reactions, and ECD calculations. It is worth noting that compound 10 was identified as a defensive secondary metabolite of strain SYSU-6786, produced through the induction of compound 8 under co-culture conditions. Compounds 3 and 4 possessed a naturally rare isotryptophan core. Moreover, compounds 1 and 2 exhibited potent inhibitory activities against fish pathogenic bacterium Edwardsiella ictalurid, with minimum inhibitory concentration values of 10.0 μg/mL for both compounds.
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