Two new stilbenes, 5-methoxy-6-(4-methoxystyryl)-3-methylbenzofuran (1) and 5-methoxy-6-(4- hydroxystyryl)-3-methylbenzofuran (2), together with six known ones, bauhiniastatin D (3), gramideoxybenzoin B (4), gramistilbenoid A (5), gramistilbenoid B (6), gramniphenol H (7), and pterostilbene (8), were isolated from the whole plants of Arundina graminifolia. Their structures were established by their 1D, 2D NMR, and MS spectral data. Compounds 1 and 2 were tested for their anti-SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) activity. The results revealed that compound 1 exhibited potential activity with IC50 of 17.4 μM for delta strain and 28.5 μM for Omicron BA.1 strain, compound 2 also showed potential activity with IC50 of 15.3 μM for delta strain and 22.6 μM for Omicron BA.1 strain, respectively.
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This project was supported financially by the National Natural Science Foundation of China (No. 32260111), the innovative Research Team of Dehong Prefecture (2022RC009), the youth Academic and Technical Leaders Project of Yunnan Province (202005AC160061), and the Yunnan Innovative Research Team (2019HC020).
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Published in Khimiya Prirodnykh Soedinenii, No. 3, May–June, 2024, pp. 351–354.
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Li, GF., Zhang, YQ., Zhao, GJ. et al. Two New Stilbenes from the Whole Plant of Arundina graminifolia and Their Anti-SARS-CoV-2 Activity. Chem Nat Compd 60, 393–397 (2024). https://doi.org/10.1007/s10600-024-04335-1
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DOI: https://doi.org/10.1007/s10600-024-04335-1