Prenylated isoflavanone from the roots of Erythrina sigmoidea
作者:Augustin E. Nkengfack、Timothee W. Vouffo、Z.T. Fomum、Michele Meyer、Ola Bergendorff、Olov Sterner
DOI:10.1016/s0031-9422(00)90489-8
日期:1994.7
A novel prenylated isoflavanone, sigmoidin I, has been isolated from the roots of Erythrina sigmoidea, in addition to the known isoflavones, corylin and neobavaisoflavone and the known pterocarpan, phaseollidin. Its structure was established as 7,4'-dihydroxy-3'-methoxy-5'-(3-methylbut-2-enyl) isoflavanone by means of spectroscopic analyses and chemical transformations. Neobavaisoflavone displayed