Scopoletin sesquiterpene ethers from Artemisia persica

The roots of Artemisia persica afforded in addition to isofraxidin-derived sesquiterpene ethers, the scopoletin farnesyl ether scopofarnol and the new scopoletin drimenyl ether scopodrimol A. The structures and stereochemistries were elucidated by spectroscopic methods. According to the leaf morphology the accumulation of coumarin sesquiterpene ethers also suggests that the species should be transferred from the section Absinthium to the section Abrotanum.