The flavonoids of Hibiscus

The structure of hybridin

“…In a quantitative determination Of the aglycone of hybridin by the gravimetrie method [1] and of the sugars by the aniline phthalate method [2] the ratio of quercetin to sugars was found to be 1 : 3 and that of xylose to galaetose and glucose 1 : 2. Thus, the hybridin isolated from the flowers of hybrid hibiscuses [3] has the structure of not a bioside l~ut a trioside of c uercetin.…”