Suaeglaucin B (7-hydroxy-3-(2-hydroxyphenyl)-5,6-dimethoxy-4H-chromen-4-one, 1), an isoflavone, including seven other known compounds (2–8), was isolated for the first time from the herbs of Suaeda glauca (Bunge) Bunge. In this article, the extraction and isolation of these compounds is carried out, and the structures of eight compounds (1–8) were established using chemical methods including HR-ESI-MS and 1D, 2D NMR spectroscopy. In addition, the antioxidant activity of compound 1, with IC50 value of 1.63 mM, was evaluated by the 1,1-diphenyl-2-picrylhydrazyl free radical (DPPH) assay.
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Acknowledgment
This project was supported by the National Natural Science Foundation of China (Grant Nos. 31570359, 31970375, 31972326, and 31770383), the Natural Science Foundation of Jiangsu Province (Grant Nos. BK20180311 and BK20170616), and the Foundation of Jiangsu Key Laboratory for the Research and Utilization of Plant Resources (Grant No. JSPKLB201925). The authors are very grateful to Prof. Chang-Qi Yuan for help with the identification of the plant.
The authors Ping Qiu and Fuqin Guan contributed equally to this work.
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Published in Khimiya Prirodnykh Soedinenii, No. 1, January–February, 2021, pp. 18–20.
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Qiu, P., Guan, F., Feng, X. et al. Suaeglaucin B, an Isoflavone from Suaeda glauca, and its Antioxidant Activity. Chem Nat Compd 57, 16–19 (2021). https://doi.org/10.1007/s10600-021-03270-9
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DOI: https://doi.org/10.1007/s10600-021-03270-9