An unusual prenyl biflavanol from Tephrosia tepicana
摘要:
The roots and aerial parts of Tephrosia tepicana afforded a prenyl biflavanol. The structure and stereochemistry were established by spectroscopic methods, some chemical transformations and confirmed by X-ray diffraction; Tepicanol A is the first biflavanol with a 4, 4 " biflavanyl ether group to be isolated from the genus Tephrosia. (C) 1997 Elsevier Science Ltd.