Three new isoquinoline alkaloids from the fermentation of Aspergillus sp. 0338 and their anti-MRSA activities.

Yang, Min; Dong, Miao; Wu, Qing-Yang; Yao, Shui; Pu, Gui; Ma, Yue-Yu; Xiong, Rui-Feng; Hu, Qiu-Fen; Wang, Fang; Li, Yin-Ke

There is growing evidence that bioactive substances produced by microbial endophytes have applicability in medicine, agriculture and industry. To enrich the bioactive substances, in our search for new bioactive metabolites from fungi Aspergillus, the phytochemical reinvestigation on the Aspergillus sp. 0338 was carried out, and this led to the isolation of three new (1-3) and five known alkaloids (4-8). Their structures were elucidated by spectroscopic analysis, including extensive 1D and 2D NMR techniques, as well as comparison with literature values. Additionally, compounds 1-3 were evaluated for their anti-MRSA activities. The results revealed that compounds 1-3 exhibited good inhibitions with IZD of 15.2 ± 1.8, 14.6 ± 2.0, and 13.4 ± 2.2 mm, respectively.

ISOQUINOLINE alkaloids; ASPERGILLUS fumigatus; ASPERGILLUS; AGRICULTURAL industries; ENDOPHYTES; ISOQUINOLINE

Natural Product Research, 2025, Vol 39, Issue 1, p103

1478-6419

Academic Journal

10.1080/14786419.2023.2254455