Four new compounds named qianhucoumarins E, F, G and baihuaqianhuoside have been isolated from the root of Peucedanum praeruptorum. Their structures were elucid
A new β-dihydroagarofuran alkaloid Ⅰ was isolated fromCelastrus angulatus.The structure was established on the basis of 1D and 2DNMR analysis,and x-ray diffra
A new series of thermotropic liquid crystalline poly(ester-imide)s were synthesized via a solution polycondensation process.Thepolymers were also characterized