13C NMR STUDIES OF SOME NATURALLY OCCURRING AMENTOFLAVONE AND HINOKIFLAVONE BIFLAVONOIDS

Article abstract of DOI:10.1016/S0031-9422(00)82499-1

The ¹³C NMR spectra of a range of amentoflavone and honokiflavone biflavonoids are reported, most for the first time.Substituent shifts relating to the interflavonoid linkages and to specific methylation patterns are defined and appear to be of diagnostic value.Key Word Index - ¹³C NMR; amentoflavones; hinokiflavones; methyl ethers; dihydro-derivatives.