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  • Title: Ellagitannins from Geranium potentillaefolium and G. bellum.
    Author: Gayosso-De-Lucio JA, Torres-Valencia JM, Cerda-García-Rojas CM, Joseph-Nathan P.
    Journal: Nat Prod Commun; 2010 Apr; 5(4):531-4. PubMed ID: 20433066.
    Abstract:
    The aerial parts of Geranium potentillaefoium afforded geraniin (1), corilagin (2), gallic acid (4), methyl gallate (6), methyl brevifolincarboxylate (7), quercetin, quercetin 3-O-beta-D-glucopyranoside, quercetin 3-O-beta-D-[6"-O-galloyl)glucopyranoside, kaempferol, beta-sitosterol 3-O-beta-D-glucopyranoside and beta-sitosterol, while the aerial parts of G. bellum gave the same compounds in addition to kaempferol 3-O-beta-D-glucopyranoside, isolated instead of kaempferol. The substances were identified by 1D and 2D NMR spectroscopy in comparison with published data. The water decoction preparations from air-dried plant materials (2.5 g) contain ca. 4.6 % of the ellagitannin 1, envisaging that when such decoction is ingested (250 mL), a therapeutic dose of ca. 36 mg of the antitumor ellagic acid (3) may be incorporated into the organism.
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