Novel C-3/C-3"-biflavanones from Stellera chamaejasme L.

Abstract

Three novel biflavanones possessing a C-3/C-3'' linkage (chamaejasmenin A, B and C) have been isolated from Stellera chamaejasme L. (Thymelaeaceae) and their structures have been elucidated on the basis of their spectral data. Chamaejasmenin B and C are the first known examples having the cis-cis configuration at the C-2/C-3 and C-2''/C-3'' positions.