(4-->6)-Coupled proteracacinidins and promelacacinidins from Acacia galpinii and Acacia caffra.
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.
Bennie
Linette
L
Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa.
Coetzee
Johan
J
Malan
Elfranco
E
Ferreira
Daneel
D
D000045:Acacia / Q000737:chemistry*; D000872:Anthocyanins / Q000032:analysis* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D044945:Proanthocyanidins
D000872:Anthocyanins; D044945:Proanthocyanidins; C013221:proanthocyanidin