From the ethanolic extract of the leaves of Bupleurum handiense three
lignans have been isolated, one of which is described for the first ti
me, while two are already known. The structure of 1, 9-(3,4-dimethoxyp
henyl)-5, 8H-furo[3',4':6,7]naphtho[2,3-d][1,3]dioxol-6-one, was deter
mined by spectroscopic methods.