title: Trimeric proteracacinidins and a (6-->6)-bis-leucoteracacinidin from Acacia galpinii and Acacia caffra.
abstract: The rare series of trimeric proteracacinidins is extended by identification of the first analogs with exclusive C-C interflavanyl bonds, i.e. epioritin-(4beta-->6)-oritin-(4alpha-->6)-epioritin-4alpha-ol,oritin-(4beta-->6)-oritin-(4alpha-->6)-epioritin-4alpha-ol, and epioritin-(4beta-->6)-epioritin-(4beta-->6)-epioritin-4alpha-ol. These compounds are accompanied by the bis-leucoteracacinidin, epioritin-4alpha-ol-(6-->6)-epioritin-4beta-ol, the first naturally occurring bis-flavan-3,4-diol.
authors.affiliation: Department of Chemistry, University of the Free State, PO Box 339, 9300, Bloemfontein, South Africa.
authors.forename: Linette
authors.initials: L
authors.lastname: Bennie
authors.forename: Johan
authors.initials: J
authors.lastname: Coetzee
authors.forename: Elfranco
authors.initials: E
authors.lastname: Malan
authors.forename: Desmond
authors.initials: D
authors.lastname: Slade
authors.forename: Jannie P J
authors.initials: JP
authors.lastname: Marais
authors.forename: Daneel
authors.initials: D
authors.lastname: Ferreira
mesh_terms: D000045:Acacia / Q000737:chemistry* / Q000235:genetics; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D044945:Proanthocyanidins / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D044945:Proanthocyanidins