13C NMR spectral analysis of dihydrobenzofuran lignans

The assignments of the 13C NMR shift values of the dihydrobenzofuranoid lignans cedrusin and dihydrodehydrodiconiferyl alcohol, their respective 4-O-β-D-glucosides and their acetates have been made. The furanoid stereochemistry in 8,3′-lignans could be deduced from comparative 13C NMR data.