An unusual isopropenyldihydrofuran biflavanol from Tephrosia crassifolia
作者:Federico Gómez-Garibay、José S Calderón、Minarda De La O Arciniega、Carlos L Céspedes、Oswaldo Téllez-Valdés、Javier Taboada
DOI:10.1016/s0031-9422(99)00336-2
日期:1999.11
Abstract The roots and aerial parts of Tephrosia crassifolia afforded an isopropenyldihydrofuran biflavanol and a new chalcone. The structures and relative configuration were established by spectroscopic and chemical methods, and confirmed by X-ray diffraction. Crassifolin is the second 3,4″ ether-linked biflavan-4-ol to be isolated from the genus Tephrosia .