(4-->6)-Coupled proteracacinidins and promelacacinidins from Acacia galpinii and Acacia caffra |
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| Authors: | Bennie Linette Coetzee Johan Malan Elfranco Ferreira Daneel |
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| Affiliation: | Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa. |
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| 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. |
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| Keywords: | Acacia galpinii Acacia caffra Leguminosae Biflavanoids Proteracacinidins Promelacacinidins Proanthocyanidins |
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