title: (4-->6)-Coupled proteracacinidins and promelacacinidins from Acacia galpinii and Acacia caffra.
abstract: The series of naturally occurring proanthocyanidins with 7,8-dihydroxylated A-rings is extended by identification of the proteracacinidins epioritin-(4beta-->6)-oritin-4alpha-ol, epioritin-(4beta-->6)-ent-oritin-4alpha-ol, ent-oritin-(4beta-->6)-epioritin-4alpha-ol, ent-oritin-(4beta-->6)-oritin-4alpha-ol, ent-oritin-(4alpha-->6)-epioritin-4alpha-ol, ent-oritin-(4alpha-->6)-oritin-4alpha-ol, ent-oritin-(4alpha-->6)-epioritin-4beta-ol, the 'mixed' pro-teracacinidins/-melacacinidins epioritin-(4beta-->6)-epimesquitol-4alpha-ol, epioritin-(4beta-->6)-epimesquitol-4beta-ol and epimesquitol-(4beta-->6)- epioritin-4alpha-ol, and the promelacacinidin epimesquitol-(4beta-->6)-epimesquitol-4beta-ol.
authors.affiliation: Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, 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: Daneel
authors.initials: D
authors.lastname: Ferreira
mesh_terms: D000045:Acacia / Q000737:chemistry*; D000872:Anthocyanins / Q000032:analysis* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D044945:Proanthocyanidins
chemical_list: D000872:Anthocyanins; D044945:Proanthocyanidins; C013221:proanthocyanidin