Note Published: 15 January 2014 Inhibition of protein SUMOylation by davidiin, an ellagitannin from Davidia involucrata Misao Takemoto, Yumi Kawamura, Mikako Hirohama, Yuki Yamaguchi, Hiroshi ...

This ellagitannin was isolated from Rosa rugosa THUNB and characterized by Okuda et al. 57 The synthesis commenced with the preparation of 1,2,3-tri- O -galloylated β- D -glucose 36 (Fig. 6).

They then began consuming ellagitannin-rich walnuts as part of a closely monitored diet. After three weeks on this diet, each participant underwent a colonoscopy.

The study was carried out on 39 patients between the ages of 40 and 65, where the participants were asked to avoid all ellagitannin-containing food to bring down their urolithin levels to zero and ...