| Structure Identification: |
| Biol Pharm Bull . 1999 Nov;22(11):1189-1192. | | Studies of the active substances in herbs used for hair treatment. II. Isolation of hair regrowth substances, acetosyringone and polyporusterone A and B, from Polyporus umbellatus Fries[Pubmed: 10598026] | | Fractionation of the 50% ethanol extract of Polyporus umbellatus Fries by column chromatography on Amberlite XAD-2, silica gel, Sephadex LH-20 and octadecyl silica gel (ODS) (C18)) monitored by a hair-regrowth activity assay, afforded three active principles, 1, 2 and 3. The structures of 1, 2 and 3 were determined as acetosyringone, Polyporusterone A, and polyporusterone B by comparison of their spectral data with that of authentic samples, respectively. The effects of several compounds related to acetosyringone, 3,4-dihydroxybenzaldehyde or Polyporusterone A on hair regrowth were also investigated. | | Chem Pharm Bull (Tokyo) . 1992 Jan;40(1):143-147. | | Studies on constituents of fruit body of Polyporus umbellatus and their cytotoxic activity[Pubmed: 1576664] | | From the crude drug Chorei, the fruit body of Polyporus umbellatus, seven new components named Polyporusterone A, B, C, D, E, F and G, were isolated and their structures were determined on the basis of the spectral data. These compounds showed cytotoxic action on leukemia 1210 cell proliferation. |
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