Beschreibung:
<jats:p>
<jats:sup>1</jats:sup>H and <jats:sup>13</jats:sup>C NMR spectra are documented for the novel flavone-6,8-di-C-glycosides isolated from the liverwort, Apometzgeria pubescens. The existence of rotational isomerism evident from these spectra is shown to be general for 8-C-monohexosylflavones and of possible diagnostic value. </jats:p>