Chemical Studies on Bryophytes. 19. Application of 13C NMR in the Structural Elucidation of Flavonoid C-Glucosides from Hedwigia ciliata.

Abstract
Two flavonoid C-glucosides were isolated from the moss H. ciliata. By means of 14C NMR studies of the 2 compounds and of a few known C-glucosides, the 2 C-glucosides were identified as apigenin 6,8-di-C-.beta.-D-glucopyranoside (vicenin-2, 1) and luteolin 6,8-di-C-.beta.-D-glucopyranoside (lucenin-2, 2).