Six pigment fractions (total yield 52.13% of raw material mass) were isolated by fractionation of polymeric components of melanin from Inonotus obliquus (Pers.) Pil. sclerotia. The isolated fractions differed in degree of aromaticity, molecular-weight distribution, and content of functional groups according to elemental analysis; UV, IR, and 13C NMR spectroscopy; and gel chromatography. The dominant components were highly aromatic polymers of molecular weight 2–20 kDa with a high content of carboxylic and phenolic hydroxyls. It was found that fractions with a high degree of aromaticity and content of pyrocatechol groups exhibited pronounced antioxidant activity.
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The work was supported financially by the Lavrent’evskii Competition of Young Scientists, SB, RAS.
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S. V. Agafonova (Deceased).
Translated from Khimiya Prirodnykh Soedinenii, No. 3, May–June, 2012, pp. 360–366.
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Olennikov, D.N., Tankhaeva, L.M., Rokhin, A.V. et al. Physicochemical properties and antioxidant activity of melanin fractions from Inonotus obliquus sclerotia. Chem Nat Compd 48, 396–403 (2012). https://doi.org/10.1007/s10600-012-0260-y
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DOI: https://doi.org/10.1007/s10600-012-0260-y