A new tetrahydrofuranol lignan, named (-)-parabenzoinol was isolated f
rom the fresh leaves of Parabenzoin trilobum Nakai (Lauraceae), and it
s structure has been elucidated by X-ray crystalographic analysis. The
isomeric properties of the compound in dimethylsulfoxide solution hav
e been studied on the basis of H-1 and C-13 NMR spectroscopy.