Conclusions
The following flavonoids have been isolated from propolis and identified: acacetin (I), 7,4′-dimethoxyflavone (II), kaempferide (III), rhamnocitrin (IV), 5,7-dihydroxy-3,4′-dihydroxyflavone (V), 3,5-dihydroxy-7,4′-dimethoxyflavone (VI), (−)-pinostrobin (VII), and (−)-5-hydroxy-7,4′-dimethoxyflavanone (VIII).
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Khimiya Prirodnykh Soedinenii, Vol. 5, No. 6, pp. 476–482, 1969
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Popravko, S.A., Gurevich, A.I. & Kolosov, M.N. Flavonoid components of propolis. Chem Nat Compd 5, 397–401 (1969). https://doi.org/10.1007/BF00568574
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DOI: https://doi.org/10.1007/BF00568574