A new catechin derivative, catechin-5-O-(6-O-galloyl-β- glucopyranoside) (2), together with ten known flavonoids, was isolated from the leaves and stems of Taxillus theifer (Hayata) H. S. Kiu. T. theifer is a shrub parasitizing on different species of plants. Three samples of T. theifer on various host plants were collected and their chemical constituent variations were identified and estimated by HPLC/UV methods. A comparison of the constituents from T. theifer parasitizing on different host trees demonstrated that catechin (1), quercetin-3-O-(6-O-galloyl-β-glucopyranoside) (3), quercetin-3-O-β-glucopyranoside (5), and quercetin-3-O-β-glucuronide (6) were the major components in the title plant irrespective of the host tree. However, the content of some components varies for each sample.
Tsai, T.-H.; Liu, Y.-C.; and Lin, L.-C.
"Flavonoids from Taxillus theifer,"
Journal of Food and Drug Analysis: Vol. 18
, Article 8.
Available at: https://doi.org/10.38212/2224-6614.2247