FIGURE 3.

1H-13C-HSQC-NMR spectra of EPs 7630 fractions. Assignments to prodelphinidins (blue), carbohydrates (red), and small phenolics like benzopyranones (black) are color-coded. In the fraction >30 kDa some sharp signals of umckalin (sulfate) and broad signals of polymeric prodelphinidins and carbohydrates are observable. In the fractions 1–30 kDa, oligomeric prodelphinidins and carbohydrates are detectable as broad signals, with only minor amounts of sharp signals of small molecules. In the fraction <1 kDa, only sharp signals of small molecules are detectable, which can be assigned to typical resonances of phenolic and carbohydrate signal patterns. In this <1 kDa fraction, no signals of prodelphinidins are detectable.