Artemisia scoparia is a species in the genus Artemisia, in the family Asteraceae. Its common name is Redstem Wormwood. It is an allergen. Chemical constituents:1.Capillarisin, 2.Chlorogenic acid butyl ester, 3.6,7-Dimethylesculetin, 4.Isosabandin, 5.Magnolioside (isoscopoletin-β-D-glucopyranoside), 6.7-Methoxycoumarin, 7.7-Methylesculetin, 8.Sabandin A, 9.Sabandin B, 10.Scoparone (6,7-dimethoxycoumarin), 11.Scopoletin, 12.β-Sitosterol. The leaf oil of Artemisia scoparia Waldst et Kit. (Asteraceae) was analyzed by capillary GC and GC/MS. Monoterpenes and phenyl propanoids amounted to 81.7%. The more important constituents were found to be gamma-terpinene (21.8%), eugenol (20.4%), eugenyl valerate (5.5%), limonene (5.0%), p-cymene (4.6%), eugenyl isovalerate (4.2%) and eugenyl butyrate (2.9%).