K. Yoshikawa et al., NEOLIGNANS AND PHENYLPROPANOIDS FROM THE RHIZOMES OF COPTIS-JAPONICA VAR DISSECTA, Chemical and Pharmaceutical Bulletin, 43(4), 1995, pp. 578-581
Six new dihydrobenzofuran neolignans were isolated from the fresh rhiz
omes of Coptis japonica var. dissecta, together with (+)-isolariciresi
nol, (+)-lariciresinol glucoside, (+)-pinoresinol, (+)-pinoresinol glu
coside, (+)-syringaresinol glucoside and ethyl ferulate. Their structu
res were determined on the basis of spectroscopic data and chemical ev
idence. Their absolute configurations were determined by means of CD s
tudies.