2030 J. Org. Chem., Vol. 52, No. 10, 1987 Shih et al. and characterizedl from the Chinese herb Glycyrrhiza uralensis Fisch. The structure of this compound 1 was initially deduced from NMR, IR, and mass spectral data. It is a methyl analogue of a known isoflavan, licoricidin (2), first isolated in 1968 from Glycyrrhiza glabra SP.~ and recently from G. uralensi~.~ We report that the structure of 1 has been confirmed by total synthesis. The ...
