Abstract
From the herbLedum palustre L., collected in July in Kostroma province we have isolated β-sitosterol, the triterpenoids taraxerol, uvaol, and ursolic acid, the coumarin fraxetin, the known flavonoids quercetin, hyperoside, and 3,3′,7-tri-O-methylquercetin, and a new natural flavonoid. The latter was isolated in the form of light yellow crystals with mp 188–190°C (from ethanol), with the composition C19H18O8. On the basis of IR, UV, NMR, and mass spectroscopy the structure of 4′,5-dihydroxy-3,3′,5′,7-tetramethoxyflavone has been suggested for it.
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Literature cited
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Additional information
All-Union Scientific-Research Institute of Medicinal Plants, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 175–180, March–April, 1980.
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Mikhailova, N.S., Rybalko, K.S. Chemical constitution ofLedum palustre . Chem Nat Compd 16, 131–135 (1980). https://doi.org/10.1007/BF00638770
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DOI: https://doi.org/10.1007/BF00638770