Two new anthraquinones, 3-hydroxy-6-hydroxymethyl-2,5-dimethylanthraquinone (1) and 6-hydroxymethyl-3-methoxy-2,5-dimethylanthraquinone (2), were isolated from the fermentation products of the endophytic fungus Phomopsis sp. Their structures were elucidated by spectroscopic methods, including extensive 1D and 2D NMR techniques. Compounds 1 and 2 were evaluated for their antimethicillin-resistant Staphylococcus aureus activity. The results showed that compounds 1 and 2 showed good inhibition with IZD of 14.2 ± 2.0 and 14.8 ± 2.2 mm, respectively. Compounds 1 and 2 were also tested for antioxidant activity; they show good activity with IC50 values of 4.18 and 4.36 μg/mL, respectively.
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This project was supported financially by the National Natural Science Foundation of China (No. 21967021), the Foundation of Yunnan Tobacco Industry Co., Ltd. (No. 2019JC04), and the Foundation of Yunnan Innovative Research Team.
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Published in Khimiya Prirodnykh Soedinenii, No. 5, September–October, 2021, pp. 707–710.
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Wu, F., Zhu, YN., Hou, YT. et al. Two New Antibacterial Anthraquinones from Cultures of an Endophytic Fungus Phomopsis sp.. Chem Nat Compd 57, 823–827 (2021). https://doi.org/10.1007/s10600-021-03489-6
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DOI: https://doi.org/10.1007/s10600-021-03489-6