Popis: |
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. |