Sesquiterpenoids from Artemisia tenuisecta

From the aerial part of Artemisia tenuisecta Nevski (Asteraceae) a new sesquiterpene along with 16 known sesquiterpenoides were isolated. Its relative structure was elucidated as l oc-acetoxyeudesm- 4, 5-expoxy-6β, 11βH-12, 6-olide from the 2D NMR and other spectral evidence. Artemisia tenuisecta Nevski (Asteraceae) have been used for a source of camphor in Uzbekistan, but there are only a few reports1, 2) on the chemical study of this plant. In a series of studies on the Artemisiae plants, a new sesquiterpene along with 16 known sesquiterpenes were isolated from A. tenuisecta collected in Uzbekistan.