Abstract:EIeven chemical constituents were isolated from.the root of Herac[eum rapula,Nine of them were furocoumarins:8-gcranyloxypsoralen(I),imperatorin(II),bergapten(III),isopimpinellin(Ⅳ),xanthotoxin(Ⅴ).xanthotoxol(Ⅵ), isoheraclenin(Ⅶ), isogosferol(Ⅷ).he raclenol(Ⅸ).Compound
(I),(Ⅲ),(Ⅴ),(Ⅵ)and(Ⅷ)were isolated from this plant for the first time.The other two com-pounds are being identified.