Two new dihydrochalcone glucosides, phloretin-4′-O-(4′′-O-galloyl)-β-D-glucoside (1) and phloretin-4′-O-(3′′-O-galloyl)-β-D-glucoside (2), were isolated from the fresh aerial part of Balanophora subcupularis P.C.Tam, together with eight known flavonoid glycosides, phloretin-4′-O-(6′′-O-galloyl)-β-D-glucoside (3), trilobatin (4), 3-hydroxyphloretin-4′-O-β-D-glucoside (5), phloretin-4′-O-(4′′,6′′-O-Sa-hexahydroxydiphenoyl)-β-D-glucoside (6), naringenin-7-O-β-D-glucoside (7), eriodictyol-7-O-β-D-glucoside (8), kaempferol-7-O-β-D-glucoside (9), and quercetin-7-O-β-D-glucoside (10). All of the compounds were elucidated by spectroscopic methods. Their antioxidant activities were examined by DPPH and ABTS assay. Compounds 1–3, 5, 6, and 10 showed significant radical scavenging activities compared with ascorbic acid.
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Acknowledgment
This work was financially supported by the Science and Technology Project of Guizhou Province [Grant No. 2019-1023] and the Project of Academic Rookie of Guizhou University of Traditional Chinese Medicine [Grant No. 2017-5735-25].
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Published in Khimiya Prirodnykh Soedinenii, No. 6, November–December, 2023, pp. 896–898
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Jiang, WJ., Du, J. & Wu, JC. Two New Dihydrochalcone Glucosides from Balanophora subcupularis. Chem Nat Compd 59, 1059–1062 (2023). https://doi.org/10.1007/s10600-023-04196-0
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DOI: https://doi.org/10.1007/s10600-023-04196-0