New Eremophilane Sesquiterpene Lactones from the Roots of the Medicinal PlantRoldana sessilifolia(Asteraceae)

Abstract
Three new eremophilanolides (5–7) were isolated and characterized from the methanol extract of the roots of Roldana sessilifolia (Asteraceae), a species used in Mexican traditional medicine. The structures were determined by spectroscopic methods.