Abstract On the basis of chemical transformations, 1 H and 13 C NMR spectra, the structure of dauroside D isolated from Haplophyllum dauricum has been established as 6-C-β-D- glucopyranosyl-5, 7-dihydroxycoumarin. Some interesting features of the 1 H NMR spectra of its acetate have been reported and an assignment of the signals in its 1 H and 13 C NMR spectra has been made. Dauroside D is the first natural coumarin C-glycoside.
