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  • Title: Isolation and identification of oligomeric procyanidins from Crataegus leaves and flowers.
    Author: Svedström U, Vuorela H, Kostiainen R, Tuominen J, Kokkonen J, Rauha JP, Laakso I, Hiltunen R.
    Journal: Phytochemistry; 2002 Aug; 60(8):821-5. PubMed ID: 12150807.
    Abstract:
    Oligomeric procyanidins were isolated from the leaves and flowers of hawthorn (Crataegus laevigata). A trimer, epicatechin-(4 beta-->8)-epicatechin-(4 beta-->6)-epicatechin, and a pentamer consisting of (-)-epicatechin units linked through C-4 beta/C-8 bonds have been isolated from hawthorn for the first time, in addition to known procyanidins including dimers B-2, B-4 and B-5, trimers C-1 and epicatechin-(4 beta-->6)-epicatechin-(4 beta-->8)-epicatechin, and tetramer D-1. A fraction containing a hexamer was also found.
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